Add m-esr52 at 52.6.0

1 files changed, 2112 insertions, 0 deletions

diff --git a/layout/tools/reftest/reftest.jsm b/layout/tools/reftest/reftest.jsm
new file mode 100644
index 000000000..69d804453
--- /dev/null
+++ b/layout/tools/reftest/reftest.jsm
@@ -0,0 +1,2112 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 4 -*- /
+/* vim: set shiftwidth=4 tabstop=8 autoindent cindent expandtab: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+this.EXPORTED_SYMBOLS = ["OnRefTestLoad", "OnRefTestUnload"];
+
+var CC = Components.classes;
+const CI = Components.interfaces;
+const CR = Components.results;
+const CU = Components.utils;
+
+const XHTML_NS = "http://www.w3.org/1999/xhtml";
+const XUL_NS = "http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul";
+
+const NS_LOCAL_FILE_CONTRACTID = "@mozilla.org/file/local;1";
+const NS_GFXINFO_CONTRACTID = "@mozilla.org/gfx/info;1";
+const IO_SERVICE_CONTRACTID = "@mozilla.org/network/io-service;1";
+const DEBUG_CONTRACTID = "@mozilla.org/xpcom/debug;1";
+const NS_LOCALFILEINPUTSTREAM_CONTRACTID =
+          "@mozilla.org/network/file-input-stream;1";
+const NS_SCRIPTSECURITYMANAGER_CONTRACTID =
+          "@mozilla.org/scriptsecuritymanager;1";
+const NS_REFTESTHELPER_CONTRACTID =
+          "@mozilla.org/reftest-helper;1";
+const NS_NETWORK_PROTOCOL_CONTRACTID_PREFIX =
+          "@mozilla.org/network/protocol;1?name=";
+const NS_XREAPPINFO_CONTRACTID =
+          "@mozilla.org/xre/app-info;1";
+const NS_DIRECTORY_SERVICE_CONTRACTID =
+          "@mozilla.org/file/directory_service;1";
+const NS_OBSERVER_SERVICE_CONTRACTID =
+          "@mozilla.org/observer-service;1";
+
+CU.import("resource://gre/modules/FileUtils.jsm");
+CU.import("chrome://reftest/content/httpd.jsm", this);
+CU.import("chrome://reftest/content/StructuredLog.jsm", this);
+CU.import("resource://gre/modules/Services.jsm");
+CU.import("resource://gre/modules/NetUtil.jsm");
+
+var gLoadTimeout = 0;
+var gTimeoutHook = null;
+var gRemote = false;
+var gIgnoreWindowSize = false;
+var gShuffle = false;
+var gRepeat = null;
+var gRunUntilFailure = false;
+var gTotalChunks = 0;
+var gThisChunk = 0;
+var gContainingWindow = null;
+var gURLFilterRegex = {};
+var gContentGfxInfo = null;
+const FOCUS_FILTER_ALL_TESTS = "all";
+const FOCUS_FILTER_NEEDS_FOCUS_TESTS = "needs-focus";
+const FOCUS_FILTER_NON_NEEDS_FOCUS_TESTS = "non-needs-focus";
+var gFocusFilterMode = FOCUS_FILTER_ALL_TESTS;
+
+// "<!--CLEAR-->"
+const BLANK_URL_FOR_CLEARING = "data:text/html;charset=UTF-8,%3C%21%2D%2DCLEAR%2D%2D%3E";
+
+var gBrowser;
+// Are we testing web content loaded in a separate process?
+var gBrowserIsRemote;           // bool
+var gB2GisMulet;                // bool
+// Are we using <iframe mozbrowser>?
+var gBrowserIsIframe;           // bool
+var gBrowserMessageManager;
+var gCanvas1, gCanvas2;
+// gCurrentCanvas is non-null between InitCurrentCanvasWithSnapshot and the next
+// RecordResult.
+var gCurrentCanvas = null;
+var gURLs;
+var gManifestsLoaded = {};
+// Map from URI spec to the number of times it remains to be used
+var gURIUseCounts;
+// Map from URI spec to the canvas rendered for that URI
+var gURICanvases;
+var gTestResults = {
+  // Successful...
+  Pass: 0,
+  LoadOnly: 0,
+  // Unexpected...
+  Exception: 0,
+  FailedLoad: 0,
+  UnexpectedFail: 0,
+  UnexpectedPass: 0,
+  AssertionUnexpected: 0,
+  AssertionUnexpectedFixed: 0,
+  // Known problems...
+  KnownFail : 0,
+  AssertionKnown: 0,
+  Random : 0,
+  Skip: 0,
+  Slow: 0,
+};
+var gTotalTests = 0;
+var gState;
+var gCurrentURL;
+var gTestLog = [];
+var gLogLevel;
+var gServer;
+var gCount = 0;
+var gAssertionCount = 0;
+
+var gIOService;
+var gDebug;
+var gWindowUtils;
+
+var gSlowestTestTime = 0;
+var gSlowestTestURL;
+var gFailedUseWidgetLayers = false;
+
+var gDrawWindowFlags;
+
+var gExpectingProcessCrash = false;
+var gExpectedCrashDumpFiles = [];
+var gUnexpectedCrashDumpFiles = { };
+var gCrashDumpDir;
+var gFailedNoPaint = false;
+var gFailedOpaqueLayer = false;
+var gFailedOpaqueLayerMessages = [];
+var gFailedAssignedLayer = false;
+var gFailedAssignedLayerMessages = [];
+
+// The enabled-state of the test-plugins, stored so they can be reset later
+var gTestPluginEnabledStates = null;
+
+const TYPE_REFTEST_EQUAL = '==';
+const TYPE_REFTEST_NOTEQUAL = '!=';
+const TYPE_LOAD = 'load';     // test without a reference (just test that it does
+                              // not assert, crash, hang, or leak)
+const TYPE_SCRIPT = 'script'; // test contains individual test results
+
+// The order of these constants matters, since when we have a status
+// listed for a *manifest*, we combine the status with the status for
+// the test by using the *larger*.
+// FIXME: In the future, we may also want to use this rule for combining
+// statuses that are on the same line (rather than making the last one
+// win).
+const EXPECTED_PASS = 0;
+const EXPECTED_FAIL = 1;
+const EXPECTED_RANDOM = 2;
+const EXPECTED_DEATH = 3;  // test must be skipped to avoid e.g. crash/hang
+const EXPECTED_FUZZY = 4;
+
+// types of preference value we might want to set for a specific test
+const PREF_BOOLEAN = 0;
+const PREF_STRING  = 1;
+const PREF_INTEGER = 2;
+
+var gPrefsToRestore = [];
+
+const gProtocolRE = /^\w+:/;
+const gPrefItemRE = /^(|test-|ref-)pref\((.+?),(.*)\)$/;
+
+var gHttpServerPort = -1;
+
+// whether to run slow tests or not
+var gRunSlowTests = true;
+
+// whether we should skip caching canvases
+var gNoCanvasCache = false;
+
+var gRecycledCanvases = new Array();
+
+// Only dump the sandbox once, because it doesn't depend on the
+// manifest URL (yet!).
+var gDumpedConditionSandbox = false;
+
+function HasUnexpectedResult()
+{
+    return gTestResults.Exception > 0 ||
+           gTestResults.FailedLoad > 0 ||
+           gTestResults.UnexpectedFail > 0 ||
+           gTestResults.UnexpectedPass > 0 ||
+           gTestResults.AssertionUnexpected > 0 ||
+           gTestResults.AssertionUnexpectedFixed > 0;
+}
+
+// By default we just log to stdout
+var gLogFile = null;
+var gDumpFn = function(line) {
+  dump(line);
+  if (gLogFile) {
+    gLogFile.write(line, line.length);
+  }
+}
+var gDumpRawLog = function(record) {
+  // Dump JSON representation of data on a single line
+  var line = "\n" + JSON.stringify(record) + "\n";
+  dump(line);
+
+  if (gLogFile) {
+    gLogFile.write(line, line.length);
+  }
+}
+var logger = new StructuredLogger('reftest', gDumpRawLog);
+
+function TestBuffer(str)
+{
+  logger.debug(str);
+  gTestLog.push(str);
+}
+
+function FlushTestBuffer()
+{
+  // In debug mode, we've dumped all these messages already.
+  if (gLogLevel !== 'debug') {
+    for (var i = 0; i < gTestLog.length; ++i) {
+      logger.info("Saved log: " + gTestLog[i]);
+    }
+  }
+  gTestLog = [];
+}
+
+function LogWidgetLayersFailure()
+{
+  logger.error("USE_WIDGET_LAYERS disabled because the screen resolution is too low. This falls back to an alternate rendering path (that may not be representative) and is not implemented with e10s enabled.");
+  logger.error("Consider increasing your screen resolution, or adding '--disable-e10s' to your './mach reftest' command");
+}
+
+function AllocateCanvas()
+{
+    if (gRecycledCanvases.length > 0) {
+        return gRecycledCanvases.shift();
+    }
+
+    var canvas = gContainingWindow.document.createElementNS(XHTML_NS, "canvas");
+    var r = gBrowser.getBoundingClientRect();
+    canvas.setAttribute("width", Math.ceil(r.width));
+    canvas.setAttribute("height", Math.ceil(r.height));
+
+    return canvas;
+}
+
+function ReleaseCanvas(canvas)
+{
+    // store a maximum of 2 canvases, if we're not caching
+    if (!gNoCanvasCache || gRecycledCanvases.length < 2) {
+        gRecycledCanvases.push(canvas);
+    }
+}
+
+function IDForEventTarget(event)
+{
+    try {
+        return "'" + event.target.getAttribute('id') + "'";
+    } catch (ex) {
+        return "<unknown>";
+    }
+}
+
+function getTestPlugin(aName) {
+  var ph = CC["@mozilla.org/plugin/host;1"].getService(CI.nsIPluginHost);
+  var tags = ph.getPluginTags();
+
+  // Find the test plugin
+  for (var i = 0; i < tags.length; i++) {
+    if (tags[i].name == aName)
+      return tags[i];
+  }
+
+  logger.warning("Failed to find the test-plugin.");
+  return null;
+}
+
+this.OnRefTestLoad = function OnRefTestLoad(win)
+{
+    gCrashDumpDir = CC[NS_DIRECTORY_SERVICE_CONTRACTID]
+                    .getService(CI.nsIProperties)
+                    .get("ProfD", CI.nsIFile);
+    gCrashDumpDir.append("minidumps");
+
+    var env = CC["@mozilla.org/process/environment;1"].
+              getService(CI.nsIEnvironment);
+
+    var prefs = Components.classes["@mozilla.org/preferences-service;1"].
+                getService(Components.interfaces.nsIPrefBranch);
+    try {
+        gBrowserIsRemote = prefs.getBoolPref("browser.tabs.remote.autostart");
+    } catch (e) {
+        gBrowserIsRemote = false;
+    }
+
+    try {
+        gB2GisMulet = prefs.getBoolPref("b2g.is_mulet");
+    } catch (e) {
+        gB2GisMulet = false;
+    }
+
+    try {
+      gBrowserIsIframe = prefs.getBoolPref("reftest.browser.iframe.enabled");
+    } catch (e) {
+      gBrowserIsIframe = false;
+    }
+
+    try {
+      gLogLevel = prefs.getCharPref("reftest.logLevel");
+    } catch (e) {
+      gLogLevel ='info';
+    }
+
+    if (win === undefined || win == null) {
+      win = window;
+    }
+    if (gContainingWindow == null && win != null) {
+      gContainingWindow = win;
+    }
+
+    if (gBrowserIsIframe) {
+      gBrowser = gContainingWindow.document.createElementNS(XHTML_NS, "iframe");
+      gBrowser.setAttribute("mozbrowser", "");
+      gBrowser.setAttribute("mozapp", prefs.getCharPref("b2g.system_manifest_url"));
+    } else {
+      gBrowser = gContainingWindow.document.createElementNS(XUL_NS, "xul:browser");
+    }
+    gBrowser.setAttribute("id", "browser");
+    gBrowser.setAttribute("type", "content-primary");
+    gBrowser.setAttribute("remote", gBrowserIsRemote ? "true" : "false");
+    // Make sure the browser element is exactly 800x1000, no matter
+    // what size our window is
+    gBrowser.setAttribute("style", "padding: 0px; margin: 0px; border:none; min-width: 800px; min-height: 1000px; max-width: 800px; max-height: 1000px");
+
+    if (Services.appinfo.OS == "Android") {
+      let doc;
+      if (Services.appinfo.widgetToolkit == "gonk") {
+        doc = gContainingWindow.document.getElementsByTagName("html")[0];
+      } else {
+        doc = gContainingWindow.document.getElementById('main-window');
+      }
+      while (doc.hasChildNodes()) {
+        doc.removeChild(doc.firstChild);
+      }
+      doc.appendChild(gBrowser);
+    } else {
+      document.getElementById("reftest-window").appendChild(gBrowser);
+    }
+
+    // reftests should have the test plugins enabled, not click-to-play
+    let plugin1 = getTestPlugin("Test Plug-in");
+    let plugin2 = getTestPlugin("Second Test Plug-in");
+    if (plugin1 && plugin2) {
+      gTestPluginEnabledStates = [plugin1.enabledState, plugin2.enabledState];
+      plugin1.enabledState = CI.nsIPluginTag.STATE_ENABLED;
+      plugin2.enabledState = CI.nsIPluginTag.STATE_ENABLED;
+    } else {
+      logger.warning("Could not get test plugin tags.");
+    }
+
+    gBrowserMessageManager = gBrowser.QueryInterface(CI.nsIFrameLoaderOwner)
+                                     .frameLoader.messageManager;
+    // The content script waits for the initial onload, then notifies
+    // us.
+    RegisterMessageListenersAndLoadContentScript();
+}
+
+function InitAndStartRefTests()
+{
+    /* These prefs are optional, so we don't need to spit an error to the log */
+    try {
+        var prefs = Components.classes["@mozilla.org/preferences-service;1"].
+                    getService(Components.interfaces.nsIPrefBranch);
+    } catch(e) {
+        logger.error("EXCEPTION: " + e);
+    }
+
+    try {
+      prefs.setBoolPref("android.widget_paints_background", false);
+    } catch (e) {}
+
+    /* set the gLoadTimeout */
+    try {
+        gLoadTimeout = prefs.getIntPref("reftest.timeout");
+    } catch(e) {
+        gLoadTimeout = 5 * 60 * 1000; //5 minutes as per bug 479518
+    }
+
+    /* Get the logfile for android tests */
+    try {
+        var logFile = prefs.getCharPref("reftest.logFile");
+        if (logFile) {
+            var f = FileUtils.File(logFile);
+            gLogFile = FileUtils.openFileOutputStream(f, FileUtils.MODE_WRONLY | FileUtils.MODE_CREATE);
+        }
+    } catch(e) {}
+
+    try {
+        gRemote = prefs.getBoolPref("reftest.remote");
+    } catch(e) {
+        gRemote = false;
+    }
+
+    try {
+        gIgnoreWindowSize = prefs.getBoolPref("reftest.ignoreWindowSize");
+    } catch(e) {
+        gIgnoreWindowSize = false;
+    }
+
+    /* Support for running a chunk (subset) of tests.  In separate try as this is optional */
+    try {
+        gTotalChunks = prefs.getIntPref("reftest.totalChunks");
+        gThisChunk = prefs.getIntPref("reftest.thisChunk");
+    }
+    catch(e) {
+        gTotalChunks = 0;
+        gThisChunk = 0;
+    }
+
+    try {
+        gFocusFilterMode = prefs.getCharPref("reftest.focusFilterMode");
+    } catch(e) {}
+
+    gWindowUtils = gContainingWindow.QueryInterface(CI.nsIInterfaceRequestor).getInterface(CI.nsIDOMWindowUtils);
+    if (!gWindowUtils || !gWindowUtils.compareCanvases)
+        throw "nsIDOMWindowUtils inteface missing";
+
+    gIOService = CC[IO_SERVICE_CONTRACTID].getService(CI.nsIIOService);
+    gDebug = CC[DEBUG_CONTRACTID].getService(CI.nsIDebug2);
+
+    RegisterProcessCrashObservers();
+
+    if (gRemote) {
+        gServer = null;
+    } else {
+        gServer = new HttpServer();
+    }
+    try {
+        if (gServer)
+            StartHTTPServer();
+    } catch (ex) {
+        //gBrowser.loadURI('data:text/plain,' + ex);
+        ++gTestResults.Exception;
+        logger.error("EXCEPTION: " + ex);
+        DoneTests();
+    }
+
+    // Focus the content browser.
+    if (gFocusFilterMode != FOCUS_FILTER_NON_NEEDS_FOCUS_TESTS) {
+        gBrowser.focus();
+    }
+
+    StartTests();
+}
+
+function StartHTTPServer()
+{
+    gServer.registerContentType("sjs", "sjs");
+    gServer.start(-1);
+    gHttpServerPort = gServer.identity.primaryPort;
+}
+
+// Perform a Fisher-Yates shuffle of the array.
+function Shuffle(array)
+{
+    for (var i = array.length - 1; i > 0; i--) {
+        var j = Math.floor(Math.random() * (i + 1));
+        var temp = array[i];
+        array[i] = array[j];
+        array[j] = temp;
+    }
+}
+
+function StartTests()
+{
+    var manifests;
+    /* These prefs are optional, so we don't need to spit an error to the log */
+    try {
+        var prefs = Components.classes["@mozilla.org/preferences-service;1"].
+                    getService(Components.interfaces.nsIPrefBranch);
+    } catch(e) {
+        logger.error("EXCEPTION: " + e);
+    }
+
+    try {
+        gNoCanvasCache = prefs.getIntPref("reftest.nocache");
+    } catch(e) {
+        gNoCanvasCache = false;
+    }
+
+    try {
+      gShuffle = prefs.getBoolPref("reftest.shuffle");
+    } catch (e) {
+      gShuffle = false;
+    }
+
+    try {
+      gRunUntilFailure = prefs.getBoolPref("reftest.runUntilFailure");
+    } catch (e) {
+      gRunUntilFailure = false;
+    }
+
+    // When we repeat this function is called again, so really only want to set
+    // gRepeat once.
+    if (gRepeat == null) {
+      try {
+        gRepeat = prefs.getIntPref("reftest.repeat");
+      } catch (e) {
+        gRepeat = 0;
+      }
+    }
+
+    try {
+        gRunSlowTests = prefs.getIntPref("reftest.skipslowtests");
+    } catch(e) {
+        gRunSlowTests = false;
+    }
+
+    if (gShuffle) {
+        gNoCanvasCache = true;
+    }
+
+    gURLs = [];
+    gManifestsLoaded = {};
+
+    try {
+        var manifests = JSON.parse(prefs.getCharPref("reftest.manifests"));
+        gURLFilterRegex = manifests[null];
+    } catch(e) {
+        logger.error("Unable to find reftest.manifests pref.  Please ensure your profile is setup properly");
+        DoneTests();
+    }
+
+    try {
+        var globalFilter = manifests.hasOwnProperty("") ? new RegExp(manifests[""]) : null;
+        var manifestURLs = Object.keys(manifests);
+
+        // Ensure we read manifests from higher up the directory tree first so that we
+        // process includes before reading the included manifest again
+        manifestURLs.sort(function(a,b) {return a.length - b.length})
+        manifestURLs.forEach(function(manifestURL) {
+            logger.info("Reading manifest " + manifestURL);
+            var filter = manifests[manifestURL] ? new RegExp(manifests[manifestURL]) : null;
+            ReadTopManifest(manifestURL, [globalFilter, filter, false]);
+        });
+        BuildUseCounts();
+
+        // Filter tests which will be skipped to get a more even distribution when chunking
+        // tURLs is a temporary array containing all active tests
+        var tURLs = new Array();
+        var tIDs = new Array();
+        for (var i = 0; i < gURLs.length; ++i) {
+            if (gURLs[i].expected == EXPECTED_DEATH)
+                continue;
+
+            if (gURLs[i].needsFocus && !Focus())
+                continue;
+
+            if (gURLs[i].slow && !gRunSlowTests)
+                continue;
+
+            tURLs.push(gURLs[i]);
+            tIDs.push(gURLs[i].identifier);
+        }
+
+        logger.suiteStart(tIDs, {"skipped": gURLs.length - tURLs.length});
+
+        if (gTotalChunks > 0 && gThisChunk > 0) {
+            // Calculate start and end indices of this chunk if tURLs array were
+            // divided evenly
+            var testsPerChunk = tURLs.length / gTotalChunks;
+            var start = Math.round((gThisChunk-1) * testsPerChunk);
+            var end = Math.round(gThisChunk * testsPerChunk);
+
+            // Map these indices onto the gURLs array. This avoids modifying the
+            // gURLs array which prevents skipped tests from showing up in the log
+            start = gThisChunk == 1 ? 0 : gURLs.indexOf(tURLs[start]);
+            end = gThisChunk == gTotalChunks ? gURLs.length : gURLs.indexOf(tURLs[end + 1]) - 1;
+            gURLs = gURLs.slice(start, end);
+
+            logger.info("Running chunk " + gThisChunk + " out of " + gTotalChunks + " chunks.  " +
+                "tests " + (start+1) + "-" + end + "/" + gURLs.length);
+        }
+
+        if (gShuffle) {
+            Shuffle(gURLs);
+        }
+
+        gTotalTests = gURLs.length;
+
+        if (!gTotalTests)
+            throw "No tests to run";
+
+        gURICanvases = {};
+        StartCurrentTest();
+    } catch (ex) {
+        //gBrowser.loadURI('data:text/plain,' + ex);
+        ++gTestResults.Exception;
+        logger.error("EXCEPTION: " + ex);
+        DoneTests();
+    }
+}
+
+function OnRefTestUnload()
+{
+  let plugin1 = getTestPlugin("Test Plug-in");
+  let plugin2 = getTestPlugin("Second Test Plug-in");
+  if (plugin1 && plugin2) {
+    plugin1.enabledState = gTestPluginEnabledStates[0];
+    plugin2.enabledState = gTestPluginEnabledStates[1];
+  } else {
+    logger.warning("Failed to get test plugin tags.");
+  }
+}
+
+// Read all available data from an input stream and return it
+// as a string.
+function getStreamContent(inputStream)
+{
+    var streamBuf = "";
+    var sis = CC["@mozilla.org/scriptableinputstream;1"].
+                  createInstance(CI.nsIScriptableInputStream);
+    sis.init(inputStream);
+
+    var available;
+    while ((available = sis.available()) != 0) {
+        streamBuf += sis.read(available);
+    }
+
+    return streamBuf;
+}
+
+// Build the sandbox for fails-if(), etc., condition evaluation.
+function BuildConditionSandbox(aURL) {
+    var sandbox = new Components.utils.Sandbox(aURL.spec);
+    var xr = CC[NS_XREAPPINFO_CONTRACTID].getService(CI.nsIXULRuntime);
+    var appInfo = CC[NS_XREAPPINFO_CONTRACTID].getService(CI.nsIXULAppInfo);
+    sandbox.isDebugBuild = gDebug.isDebugBuild;
+
+    // xr.XPCOMABI throws exception for configurations without full ABI
+    // support (mobile builds on ARM)
+    var XPCOMABI = "";
+    try {
+        XPCOMABI = xr.XPCOMABI;
+    } catch(e) {}
+
+    sandbox.xulRuntime = CU.cloneInto({widgetToolkit: xr.widgetToolkit, OS: xr.OS, XPCOMABI: XPCOMABI}, sandbox);
+
+    var testRect = gBrowser.getBoundingClientRect();
+    sandbox.smallScreen = false;
+    if (gContainingWindow.innerWidth < 800 || gContainingWindow.innerHeight < 1000) {
+        sandbox.smallScreen = true;
+    }
+
+    var gfxInfo = (NS_GFXINFO_CONTRACTID in CC) && CC[NS_GFXINFO_CONTRACTID].getService(CI.nsIGfxInfo);
+    let readGfxInfo = function (obj, key) {
+      if (gContentGfxInfo && (key in gContentGfxInfo)) {
+        return gContentGfxInfo[key];
+      }
+      return obj[key];
+    }
+
+    try {
+      sandbox.d2d = readGfxInfo(gfxInfo, "D2DEnabled");
+      sandbox.dwrite = readGfxInfo(gfxInfo, "DWriteEnabled");
+    } catch (e) {
+      sandbox.d2d = false;
+      sandbox.dwrite = false;
+    }
+
+    var info = gfxInfo.getInfo();
+    var canvasBackend = readGfxInfo(info, "AzureCanvasBackend");
+    var contentBackend = readGfxInfo(info, "AzureContentBackend");
+    var canvasAccelerated = readGfxInfo(info, "AzureCanvasAccelerated");
+
+    sandbox.azureCairo = canvasBackend == "cairo";
+    sandbox.azureQuartz = canvasBackend == "quartz";
+    sandbox.azureSkia = canvasBackend == "skia";
+    sandbox.skiaContent = contentBackend == "skia";
+    sandbox.azureSkiaGL = canvasAccelerated; // FIXME: assumes GL right now
+    // true if we are using the same Azure backend for rendering canvas and content
+    sandbox.contentSameGfxBackendAsCanvas = contentBackend == canvasBackend
+                                            || (contentBackend == "none" && canvasBackend == "cairo");
+
+    sandbox.layersGPUAccelerated =
+      gWindowUtils.layerManagerType != "Basic";
+    sandbox.d3d11 =
+      gWindowUtils.layerManagerType == "Direct3D 11";
+    sandbox.d3d9 =
+      gWindowUtils.layerManagerType == "Direct3D 9";
+    sandbox.layersOpenGL =
+      gWindowUtils.layerManagerType == "OpenGL";
+    sandbox.layersOMTC =
+      gWindowUtils.layerManagerRemote == true;
+
+    // Shortcuts for widget toolkits.
+    sandbox.B2G = xr.widgetToolkit == "gonk";
+    sandbox.Android = xr.OS == "Android" && !sandbox.B2G;
+    sandbox.cocoaWidget = xr.widgetToolkit == "cocoa";
+    sandbox.gtkWidget = xr.widgetToolkit == "gtk2"
+                        || xr.widgetToolkit == "gtk3";
+    sandbox.qtWidget = xr.widgetToolkit == "qt";
+    sandbox.winWidget = xr.widgetToolkit == "windows";
+
+    // Scrollbars that are semi-transparent. See bug 1169666.
+    sandbox.transparentScrollbars = xr.widgetToolkit == "gtk3";
+
+    if (sandbox.Android) {
+        var sysInfo = CC["@mozilla.org/system-info;1"].getService(CI.nsIPropertyBag2);
+
+        // This is currently used to distinguish Android 4.0.3 (SDK version 15)
+        // and later from Android 2.x
+        sandbox.AndroidVersion = sysInfo.getPropertyAsInt32("version");
+    }
+
+#if MOZ_ASAN
+    sandbox.AddressSanitizer = true;
+#else
+    sandbox.AddressSanitizer = false;
+#endif
+
+#if MOZ_WEBRTC
+    sandbox.webrtc = true;
+#else
+    sandbox.webrtc = false;
+#endif
+
+    var hh = CC[NS_NETWORK_PROTOCOL_CONTRACTID_PREFIX + "http"].
+                 getService(CI.nsIHttpProtocolHandler);
+    var httpProps = ["userAgent", "appName", "appVersion", "vendor",
+                     "vendorSub", "product", "productSub", "platform",
+                     "oscpu", "language", "misc"];
+    sandbox.http = new sandbox.Object();
+    httpProps.forEach((x) => sandbox.http[x] = hh[x]);
+
+    // Set OSX to be the Mac OS X version, as an integer, or undefined
+    // for other platforms.  The integer is formed by 100 times the
+    // major version plus the minor version, so 1006 for 10.6, 1010 for
+    // 10.10, etc.
+    var osxmatch = /Mac OS X (\d+).(\d+)$/.exec(hh.oscpu);
+    sandbox.OSX = osxmatch ? parseInt(osxmatch[1]) * 100 + parseInt(osxmatch[2]) : undefined;
+
+    // see if we have the test plugin available,
+    // and set a sandox prop accordingly
+    var navigator = gContainingWindow.navigator;
+    var testPlugin = navigator.plugins["Test Plug-in"];
+    sandbox.haveTestPlugin = !!testPlugin;
+
+    // Set a flag on sandbox if the windows default theme is active
+    sandbox.windowsDefaultTheme = gContainingWindow.matchMedia("(-moz-windows-default-theme)").matches;
+
+    var prefs = CC["@mozilla.org/preferences-service;1"].
+                getService(CI.nsIPrefBranch);
+    try {
+        sandbox.nativeThemePref = !prefs.getBoolPref("mozilla.widget.disable-native-theme");
+    } catch (e) {
+        sandbox.nativeThemePref = true;
+    }
+
+    sandbox.prefs = CU.cloneInto({
+        getBoolPref: function(p) { return prefs.getBoolPref(p); },
+        getIntPref:  function(p) { return prefs.getIntPref(p); }
+    }, sandbox, { cloneFunctions: true });
+
+    // Tests shouldn't care about this except for when they need to
+    // crash the content process
+    sandbox.browserIsRemote = gBrowserIsRemote;
+    sandbox.Mulet = gB2GisMulet;
+
+    try {
+        sandbox.asyncPan = gContainingWindow.document.docShell.asyncPanZoomEnabled;
+    } catch (e) {
+        sandbox.asyncPan = false;
+    }
+
+    if (!gDumpedConditionSandbox) {
+        logger.info("Dumping JSON representation of sandbox");
+        logger.info(JSON.stringify(CU.waiveXrays(sandbox)));
+        gDumpedConditionSandbox = true;
+    }
+
+    // Graphics features
+    sandbox.usesRepeatResampling = sandbox.d2d;
+    return sandbox;
+}
+
+function AddPrefSettings(aWhere, aPrefName, aPrefValExpression, aSandbox, aTestPrefSettings, aRefPrefSettings)
+{
+    var prefVal = Components.utils.evalInSandbox("(" + aPrefValExpression + ")", aSandbox);
+    var prefType;
+    var valType = typeof(prefVal);
+    if (valType == "boolean") {
+        prefType = PREF_BOOLEAN;
+    } else if (valType == "string") {
+        prefType = PREF_STRING;
+    } else if (valType == "number" && (parseInt(prefVal) == prefVal)) {
+        prefType = PREF_INTEGER;
+    } else {
+        return false;
+    }
+    var setting = { name: aPrefName,
+                    type: prefType,
+                    value: prefVal };
+    if (aWhere != "ref-") {
+        aTestPrefSettings.push(setting);
+    }
+    if (aWhere != "test-") {
+        aRefPrefSettings.push(setting);
+    }
+    return true;
+}
+
+function ReadTopManifest(aFileURL, aFilter)
+{
+    var url = gIOService.newURI(aFileURL, null, null);
+    if (!url)
+        throw "Expected a file or http URL for the manifest.";
+    ReadManifest(url, EXPECTED_PASS, aFilter);
+}
+
+function AddTestItem(aTest, aFilter)
+{
+    if (!aFilter)
+        aFilter = [null, [], false];
+
+    globalFilter = aFilter[0];
+    manifestFilter = aFilter[1];
+    invertManifest = aFilter[2];
+    if ((globalFilter && !globalFilter.test(aTest.url1.spec)) ||
+        (manifestFilter &&
+         !(invertManifest ^ manifestFilter.test(aTest.url1.spec))))
+        return;
+    if (gFocusFilterMode == FOCUS_FILTER_NEEDS_FOCUS_TESTS &&
+        !aTest.needsFocus)
+        return;
+    if (gFocusFilterMode == FOCUS_FILTER_NON_NEEDS_FOCUS_TESTS &&
+        aTest.needsFocus)
+        return;
+
+    if (aTest.url2 !== null)
+        aTest.identifier = [aTest.prettyPath, aTest.type, aTest.url2.spec];
+    else
+        aTest.identifier = aTest.prettyPath;
+
+    gURLs.push(aTest);
+}
+
+// Note: If you materially change the reftest manifest parsing,
+// please keep the parser in print-manifest-dirs.py in sync.
+function ReadManifest(aURL, inherited_status, aFilter)
+{
+    // Ensure each manifest is only read once. This assumes that manifests that are
+    // included with an unusual inherited_status or filters will be read via their
+    // include before they are read directly in the case of a duplicate
+    if (gManifestsLoaded.hasOwnProperty(aURL.spec)) {
+        if (gManifestsLoaded[aURL.spec] === null)
+            return;
+        else
+            aFilter = [aFilter[0], aFilter[1], true];
+    }
+    gManifestsLoaded[aURL.spec] = aFilter[1];
+
+    var secMan = CC[NS_SCRIPTSECURITYMANAGER_CONTRACTID]
+                     .getService(CI.nsIScriptSecurityManager);
+
+    var listURL = aURL;
+    var channel = NetUtil.newChannel({uri: aURL, loadUsingSystemPrincipal: true});
+    var inputStream = channel.open2();
+    if (channel instanceof Components.interfaces.nsIHttpChannel
+        && channel.responseStatus != 200) {
+      logger.error("HTTP ERROR : " + channel.responseStatus);
+    }
+    var streamBuf = getStreamContent(inputStream);
+    inputStream.close();
+    var lines = streamBuf.split(/\n|\r|\r\n/);
+
+    // Build the sandbox for fails-if(), etc., condition evaluation.
+    var sandbox = BuildConditionSandbox(aURL);
+    var lineNo = 0;
+    var urlprefix = "";
+    var defaultTestPrefSettings = [], defaultRefPrefSettings = [];
+    for (var str of lines) {
+        ++lineNo;
+        if (str.charAt(0) == "#")
+            continue; // entire line was a comment
+        var i = str.search(/\s+#/);
+        if (i >= 0)
+            str = str.substring(0, i);
+        // strip leading and trailing whitespace
+        str = str.replace(/^\s*/, '').replace(/\s*$/, '');
+        if (!str || str == "")
+            continue;
+        var items = str.split(/\s+/); // split on whitespace
+
+        if (items[0] == "url-prefix") {
+            if (items.length != 2)
+                throw "url-prefix requires one url in manifest file " + aURL.spec + " line " + lineNo;
+            urlprefix = items[1];
+            continue;
+        }
+
+        if (items[0] == "default-preferences") {
+            var m;
+            var item;
+            defaultTestPrefSettings = [];
+            defaultRefPrefSettings = [];
+            items.shift();
+            while ((item = items.shift())) {
+                if (!(m = item.match(gPrefItemRE))) {
+                    throw "Unexpected item in default-preferences list in manifest file " + aURL.spec + " line " + lineNo;
+                }
+                if (!AddPrefSettings(m[1], m[2], m[3], sandbox, defaultTestPrefSettings, defaultRefPrefSettings)) {
+                    throw "Error in pref value in manifest file " + aURL.spec + " line " + lineNo;
+                }
+            }
+            continue;
+        }
+
+        var expected_status = EXPECTED_PASS;
+        var allow_silent_fail = false;
+        var minAsserts = 0;
+        var maxAsserts = 0;
+        var needs_focus = false;
+        var slow = false;
+        var testPrefSettings = defaultTestPrefSettings.concat();
+        var refPrefSettings = defaultRefPrefSettings.concat();
+        var fuzzy_max_delta = 2;
+        var fuzzy_max_pixels = 1;
+        var chaosMode = false;
+
+        while (items[0].match(/^(fails|needs-focus|random|skip|asserts|slow|require-or|silentfail|pref|test-pref|ref-pref|fuzzy|chaos-mode)/)) {
+            var item = items.shift();
+            var stat;
+            var cond;
+            var m = item.match(/^(fails|random|skip|silentfail)-if(\(.*\))$/);
+            if (m) {
+                stat = m[1];
+                // Note: m[2] contains the parentheses, and we want them.
+                cond = Components.utils.evalInSandbox(m[2], sandbox);
+            } else if (item.match(/^(fails|random|skip)$/)) {
+                stat = item;
+                cond = true;
+            } else if (item == "needs-focus") {
+                needs_focus = true;
+                cond = false;
+            } else if ((m = item.match(/^asserts\((\d+)(-\d+)?\)$/))) {
+                cond = false;
+                minAsserts = Number(m[1]);
+                maxAsserts = (m[2] == undefined) ? minAsserts
+                                                 : Number(m[2].substring(1));
+            } else if ((m = item.match(/^asserts-if\((.*?),(\d+)(-\d+)?\)$/))) {
+                cond = false;
+                if (Components.utils.evalInSandbox("(" + m[1] + ")", sandbox)) {
+                    minAsserts = Number(m[2]);
+                    maxAsserts =
+                      (m[3] == undefined) ? minAsserts
+                                          : Number(m[3].substring(1));
+                }
+            } else if (item == "slow") {
+                cond = false;
+                slow = true;
+            } else if ((m = item.match(/^require-or\((.*?)\)$/))) {
+                var args = m[1].split(/,/);
+                if (args.length != 2) {
+                    throw "Error in manifest file " + aURL.spec + " line " + lineNo + ": wrong number of args to require-or";
+                }
+                var [precondition_str, fallback_action] = args;
+                var preconditions = precondition_str.split(/&&/);
+                cond = false;
+                for (var precondition of preconditions) {
+                    if (precondition === "debugMode") {
+                        // Currently unimplemented. Requires asynchronous
+                        // JSD call + getting an event while no JS is running
+                        stat = fallback_action;
+                        cond = true;
+                        break;
+                    } else if (precondition === "true") {
+                        // For testing
+                    } else {
+                        // Unknown precondition. Assume it is unimplemented.
+                        stat = fallback_action;
+                        cond = true;
+                        break;
+                    }
+                }
+            } else if ((m = item.match(/^slow-if\((.*?)\)$/))) {
+                cond = false;
+                if (Components.utils.evalInSandbox("(" + m[1] + ")", sandbox))
+                    slow = true;
+            } else if (item == "silentfail") {
+                cond = false;
+                allow_silent_fail = true;
+            } else if ((m = item.match(gPrefItemRE))) {
+                cond = false;
+                if (!AddPrefSettings(m[1], m[2], m[3], sandbox, testPrefSettings, refPrefSettings)) {
+                    throw "Error in pref value in manifest file " + aURL.spec + " line " + lineNo;
+                }
+            } else if ((m = item.match(/^fuzzy\((\d+),(\d+)\)$/))) {
+              cond = false;
+              expected_status = EXPECTED_FUZZY;
+              fuzzy_max_delta = Number(m[1]);
+              fuzzy_max_pixels = Number(m[2]);
+            } else if ((m = item.match(/^fuzzy-if\((.*?),(\d+),(\d+)\)$/))) {
+              cond = false;
+              if (Components.utils.evalInSandbox("(" + m[1] + ")", sandbox)) {
+                expected_status = EXPECTED_FUZZY;
+                fuzzy_max_delta = Number(m[2]);
+                fuzzy_max_pixels = Number(m[3]);
+              }
+            } else if (item == "chaos-mode") {
+                cond = false;
+                chaosMode = true;
+            } else {
+                throw "Error in manifest file " + aURL.spec + " line " + lineNo + ": unexpected item " + item;
+            }
+
+            if (cond) {
+                if (stat == "fails") {
+                    expected_status = EXPECTED_FAIL;
+                } else if (stat == "random") {
+                    expected_status = EXPECTED_RANDOM;
+                } else if (stat == "skip") {
+                    expected_status = EXPECTED_DEATH;
+                } else if (stat == "silentfail") {
+                    allow_silent_fail = true;
+                }
+            }
+        }
+
+        expected_status = Math.max(expected_status, inherited_status);
+
+        if (minAsserts > maxAsserts) {
+            throw "Bad range in manifest file " + aURL.spec + " line " + lineNo;
+        }
+
+        var runHttp = false;
+        var httpDepth;
+        if (items[0] == "HTTP") {
+            runHttp = (aURL.scheme == "file"); // We can't yet run the local HTTP server
+                                               // for non-local reftests.
+            httpDepth = 0;
+            items.shift();
+        } else if (items[0].match(/HTTP\(\.\.(\/\.\.)*\)/)) {
+            // Accept HTTP(..), HTTP(../..), HTTP(../../..), etc.
+            runHttp = (aURL.scheme == "file"); // We can't yet run the local HTTP server
+                                               // for non-local reftests.
+            httpDepth = (items[0].length - 5) / 3;
+            items.shift();
+        }
+
+        // do not prefix the url for include commands or urls specifying
+        // a protocol
+        if (urlprefix && items[0] != "include") {
+            if (items.length > 1 && !items[1].match(gProtocolRE)) {
+                items[1] = urlprefix + items[1];
+            }
+            if (items.length > 2 && !items[2].match(gProtocolRE)) {
+                items[2] = urlprefix + items[2];
+            }
+        }
+
+        var principal = secMan.createCodebasePrincipal(aURL, {});
+
+        if (items[0] == "include") {
+            if (items.length != 2)
+                throw "Error in manifest file " + aURL.spec + " line " + lineNo + ": incorrect number of arguments to include";
+            if (runHttp)
+                throw "Error in manifest file " + aURL.spec + " line " + lineNo + ": use of include with http";
+            var incURI = gIOService.newURI(items[1], null, listURL);
+            secMan.checkLoadURIWithPrincipal(principal, incURI,
+                                             CI.nsIScriptSecurityManager.DISALLOW_SCRIPT);
+            ReadManifest(incURI, expected_status, aFilter);
+        } else if (items[0] == TYPE_LOAD) {
+            if (items.length != 2)
+                throw "Error in manifest file " + aURL.spec + " line " + lineNo + ": incorrect number of arguments to load";
+            if (expected_status != EXPECTED_PASS &&
+                expected_status != EXPECTED_DEATH)
+                throw "Error in manifest file " + aURL.spec + " line " + lineNo + ": incorrect known failure type for load test";
+            var [testURI] = runHttp
+                            ? ServeFiles(principal, httpDepth,
+                                         listURL, [items[1]])
+                            : [gIOService.newURI(items[1], null, listURL)];
+            var prettyPath = runHttp
+                           ? gIOService.newURI(items[1], null, listURL).spec
+                           : testURI.spec;
+            secMan.checkLoadURIWithPrincipal(principal, testURI,
+                                             CI.nsIScriptSecurityManager.DISALLOW_SCRIPT);
+            AddTestItem({ type: TYPE_LOAD,
+                          expected: expected_status,
+                          allowSilentFail: allow_silent_fail,
+                          prettyPath: prettyPath,
+                          minAsserts: minAsserts,
+                          maxAsserts: maxAsserts,
+                          needsFocus: needs_focus,
+                          slow: slow,
+                          prefSettings1: testPrefSettings,
+                          prefSettings2: refPrefSettings,
+                          fuzzyMaxDelta: fuzzy_max_delta,
+                          fuzzyMaxPixels: fuzzy_max_pixels,
+                          url1: testURI,
+                          url2: null,
+                          chaosMode: chaosMode }, aFilter);
+        } else if (items[0] == TYPE_SCRIPT) {
+            if (items.length != 2)
+                throw "Error in manifest file " + aURL.spec + " line " + lineNo + ": incorrect number of arguments to script";
+            var [testURI] = runHttp
+                            ? ServeFiles(principal, httpDepth,
+                                         listURL, [items[1]])
+                            : [gIOService.newURI(items[1], null, listURL)];
+            var prettyPath = runHttp
+                           ? gIOService.newURI(items[1], null, listURL).spec
+                           : testURI.spec;
+            secMan.checkLoadURIWithPrincipal(principal, testURI,
+                                             CI.nsIScriptSecurityManager.DISALLOW_SCRIPT);
+            AddTestItem({ type: TYPE_SCRIPT,
+                          expected: expected_status,
+                          allowSilentFail: allow_silent_fail,
+                          prettyPath: prettyPath,
+                          minAsserts: minAsserts,
+                          maxAsserts: maxAsserts,
+                          needsFocus: needs_focus,
+                          slow: slow,
+                          prefSettings1: testPrefSettings,
+                          prefSettings2: refPrefSettings,
+                          fuzzyMaxDelta: fuzzy_max_delta,
+                          fuzzyMaxPixels: fuzzy_max_pixels,
+                          url1: testURI,
+                          url2: null,
+                          chaosMode: chaosMode }, aFilter);
+        } else if (items[0] == TYPE_REFTEST_EQUAL || items[0] == TYPE_REFTEST_NOTEQUAL) {
+            if (items.length != 3)
+                throw "Error in manifest file " + aURL.spec + " line " + lineNo + ": incorrect number of arguments to " + items[0];
+            var [testURI, refURI] = runHttp
+                                  ? ServeFiles(principal, httpDepth,
+                                               listURL, [items[1], items[2]])
+                                  : [gIOService.newURI(items[1], null, listURL),
+                                     gIOService.newURI(items[2], null, listURL)];
+            var prettyPath = runHttp
+                           ? gIOService.newURI(items[1], null, listURL).spec
+                           : testURI.spec;
+            secMan.checkLoadURIWithPrincipal(principal, testURI,
+                                             CI.nsIScriptSecurityManager.DISALLOW_SCRIPT);
+            secMan.checkLoadURIWithPrincipal(principal, refURI,
+                                             CI.nsIScriptSecurityManager.DISALLOW_SCRIPT);
+            AddTestItem({ type: items[0],
+                          expected: expected_status,
+                          allowSilentFail: allow_silent_fail,
+                          prettyPath: prettyPath,
+                          minAsserts: minAsserts,
+                          maxAsserts: maxAsserts,
+                          needsFocus: needs_focus,
+                          slow: slow,
+                          prefSettings1: testPrefSettings,
+                          prefSettings2: refPrefSettings,
+                          fuzzyMaxDelta: fuzzy_max_delta,
+                          fuzzyMaxPixels: fuzzy_max_pixels,
+                          url1: testURI,
+                          url2: refURI,
+                          chaosMode: chaosMode }, aFilter);
+        } else {
+            throw "Error in manifest file " + aURL.spec + " line " + lineNo + ": unknown test type " + items[0];
+        }
+    }
+}
+
+function AddURIUseCount(uri)
+{
+    if (uri == null)
+        return;
+
+    var spec = uri.spec;
+    if (spec in gURIUseCounts) {
+        gURIUseCounts[spec]++;
+    } else {
+        gURIUseCounts[spec] = 1;
+    }
+}
+
+function BuildUseCounts()
+{
+    if (gNoCanvasCache) {
+        return;
+    }
+
+    gURIUseCounts = {};
+    for (var i = 0; i < gURLs.length; ++i) {
+        var url = gURLs[i];
+        if (url.expected != EXPECTED_DEATH &&
+            (url.type == TYPE_REFTEST_EQUAL ||
+             url.type == TYPE_REFTEST_NOTEQUAL)) {
+            if (url.prefSettings1.length == 0) {
+                AddURIUseCount(gURLs[i].url1);
+            }
+            if (url.prefSettings2.length == 0) {
+                AddURIUseCount(gURLs[i].url2);
+            }
+        }
+    }
+}
+
+function ServeFiles(manifestPrincipal, depth, aURL, files)
+{
+    var listURL = aURL.QueryInterface(CI.nsIFileURL);
+    var directory = listURL.file.parent;
+
+    // Allow serving a tree that's an ancestor of the directory containing
+    // the files so that they can use resources in ../ (etc.).
+    var dirPath = "/";
+    while (depth > 0) {
+        dirPath = "/" + directory.leafName + dirPath;
+        directory = directory.parent;
+        --depth;
+    }
+
+    gCount++;
+    var path = "/" + Date.now() + "/" + gCount;
+    gServer.registerDirectory(path + "/", directory);
+
+    var secMan = CC[NS_SCRIPTSECURITYMANAGER_CONTRACTID]
+                     .getService(CI.nsIScriptSecurityManager);
+
+    var testbase = gIOService.newURI("http://localhost:" + gHttpServerPort +
+                                     path + dirPath, null, null);
+
+    // Give the testbase URI access to XUL and XBL
+    Services.perms.add(testbase, "allowXULXBL", Services.perms.ALLOW_ACTION);
+
+    function FileToURI(file)
+    {
+        // Only serve relative URIs via the HTTP server, not absolute
+        // ones like about:blank.
+        var testURI = gIOService.newURI(file, null, testbase);
+
+        // XXX necessary?  manifestURL guaranteed to be file, others always HTTP
+        secMan.checkLoadURIWithPrincipal(manifestPrincipal, testURI,
+                                         CI.nsIScriptSecurityManager.DISALLOW_SCRIPT);
+
+        return testURI;
+    }
+
+    return files.map(FileToURI);
+}
+
+// Return true iff this window is focused when this function returns.
+function Focus()
+{
+    var fm = CC["@mozilla.org/focus-manager;1"].getService(CI.nsIFocusManager);
+    fm.focusedWindow = gContainingWindow;
+#ifdef XP_MACOSX
+    try {
+        var dock = CC["@mozilla.org/widget/macdocksupport;1"].getService(CI.nsIMacDockSupport);
+        dock.activateApplication(true);
+    } catch(ex) {
+    }
+#endif // XP_MACOSX
+    return true;
+}
+
+function Blur()
+{
+    // On non-remote reftests, this will transfer focus to the dummy window
+    // we created to hold focus for non-needs-focus tests.  Buggy tests
+    // (ones which require focus but don't request needs-focus) will then
+    // fail.
+    gContainingWindow.blur();
+}
+
+function StartCurrentTest()
+{
+    gTestLog = [];
+
+    // make sure we don't run tests that are expected to kill the browser
+    while (gURLs.length > 0) {
+        var test = gURLs[0];
+        logger.testStart(test.identifier);
+        if (test.expected == EXPECTED_DEATH) {
+            ++gTestResults.Skip;
+            logger.testEnd(test.identifier, "SKIP");
+            gURLs.shift();
+        } else if (test.needsFocus && !Focus()) {
+            // FIXME: Marking this as a known fail is dangerous!  What
+            // if it starts failing all the time?
+            ++gTestResults.Skip;
+            logger.testEnd(test.identifier, "SKIP", null, "(COULDN'T GET FOCUS)");
+            gURLs.shift();
+        } else if (test.slow && !gRunSlowTests) {
+            ++gTestResults.Slow;
+            logger.testEnd(test.identifier, "SKIP", null, "(SLOW)");
+            gURLs.shift();
+        } else {
+            break;
+        }
+    }
+
+    if ((gURLs.length == 0 && gRepeat == 0) ||
+        (gRunUntilFailure && HasUnexpectedResult())) {
+        RestoreChangedPreferences();
+        DoneTests();
+    } else if (gURLs.length == 0 && gRepeat > 0) {
+        // Repeat
+        gRepeat--;
+        StartTests();
+    } else {
+        if (gURLs[0].chaosMode) {
+            gWindowUtils.enterChaosMode();
+        }
+        if (!gURLs[0].needsFocus) {
+            Blur();
+        }
+        var currentTest = gTotalTests - gURLs.length;
+        gContainingWindow.document.title = "reftest: " + currentTest + " / " + gTotalTests +
+            " (" + Math.floor(100 * (currentTest / gTotalTests)) + "%)";
+        StartCurrentURI(1);
+    }
+}
+
+function StartCurrentURI(aState)
+{
+    gState = aState;
+    gCurrentURL = gURLs[0]["url" + aState].spec;
+
+    RestoreChangedPreferences();
+
+    var prefSettings = gURLs[0]["prefSettings" + aState];
+    if (prefSettings.length > 0) {
+        var prefs = Components.classes["@mozilla.org/preferences-service;1"].
+                    getService(Components.interfaces.nsIPrefBranch);
+        var badPref = undefined;
+        try {
+            prefSettings.forEach(function(ps) {
+                var oldVal;
+                if (ps.type == PREF_BOOLEAN) {
+                    try {
+                        oldVal = prefs.getBoolPref(ps.name);
+                    } catch (e) {
+                        badPref = "boolean preference '" + ps.name + "'";
+                        throw "bad pref";
+                    }
+                } else if (ps.type == PREF_STRING) {
+                    try {
+                        oldVal = prefs.getCharPref(ps.name);
+                    } catch (e) {
+                        badPref = "string preference '" + ps.name + "'";
+                        throw "bad pref";
+                    }
+                } else if (ps.type == PREF_INTEGER) {
+                    try {
+                        oldVal = prefs.getIntPref(ps.name);
+                    } catch (e) {
+                        badPref = "integer preference '" + ps.name + "'";
+                        throw "bad pref";
+                    }
+                } else {
+                    throw "internal error - unknown preference type";
+                }
+                if (oldVal != ps.value) {
+                    gPrefsToRestore.push( { name: ps.name,
+                                            type: ps.type,
+                                            value: oldVal } );
+                    var value = ps.value;
+                    if (ps.type == PREF_BOOLEAN) {
+                        prefs.setBoolPref(ps.name, value);
+                    } else if (ps.type == PREF_STRING) {
+                        prefs.setCharPref(ps.name, value);
+                        value = '"' + value + '"';
+                    } else if (ps.type == PREF_INTEGER) {
+                        prefs.setIntPref(ps.name, value);
+                    }
+                    logger.info("SET PREFERENCE pref(" + ps.name + "," + value + ")");
+                }
+            });
+        } catch (e) {
+            if (e == "bad pref") {
+                var test = gURLs[0];
+                if (test.expected == EXPECTED_FAIL) {
+                    logger.testEnd(test.identifier, "FAIL", "FAIL",
+                                   "(SKIPPED; " + badPref + " not known or wrong type)");
+                    ++gTestResults.Skip;
+                } else {
+                    logger.testEnd(test.identifier, "FAIL", "PASS",
+                                   badPref + " not known or wrong type");
+                    ++gTestResults.UnexpectedFail;
+                }
+
+                // skip the test that had a bad preference
+                gURLs.shift();
+                StartCurrentTest();
+                return;
+            } else {
+                throw e;
+            }
+        }
+    }
+
+    if (prefSettings.length == 0 &&
+        gURICanvases[gCurrentURL] &&
+        (gURLs[0].type == TYPE_REFTEST_EQUAL ||
+         gURLs[0].type == TYPE_REFTEST_NOTEQUAL) &&
+        gURLs[0].maxAsserts == 0) {
+        // Pretend the document loaded --- RecordResult will notice
+        // there's already a canvas for this URL
+        gContainingWindow.setTimeout(RecordResult, 0);
+    } else {
+        var currentTest = gTotalTests - gURLs.length;
+        // Log this to preserve the same overall log format,
+        // should be removed if the format is updated
+        gDumpFn("REFTEST TEST-LOAD | " + gCurrentURL + " | " + currentTest + " / " + gTotalTests +
+                " (" + Math.floor(100 * (currentTest / gTotalTests)) + "%)\n");
+        TestBuffer("START " + gCurrentURL);
+        var type = gURLs[0].type
+        if (TYPE_SCRIPT == type) {
+            SendLoadScriptTest(gCurrentURL, gLoadTimeout);
+        } else {
+            SendLoadTest(type, gCurrentURL, gLoadTimeout);
+        }
+    }
+}
+
+function DoneTests()
+{
+    logger.suiteEnd(extra={'results': gTestResults});
+    logger.info("Slowest test took " + gSlowestTestTime + "ms (" + gSlowestTestURL + ")");
+    logger.info("Total canvas count = " + gRecycledCanvases.length);
+    if (gFailedUseWidgetLayers) {
+        LogWidgetLayersFailure();
+    }
+
+    function onStopped() {
+        let appStartup = CC["@mozilla.org/toolkit/app-startup;1"].getService(CI.nsIAppStartup);
+        appStartup.quit(CI.nsIAppStartup.eForceQuit);
+    }
+    if (gServer) {
+        gServer.stop(onStopped);
+    }
+    else {
+        onStopped();
+    }
+}
+
+function UpdateCanvasCache(url, canvas)
+{
+    var spec = url.spec;
+
+    --gURIUseCounts[spec];
+
+    if (gURIUseCounts[spec] == 0) {
+        ReleaseCanvas(canvas);
+        delete gURICanvases[spec];
+    } else if (gURIUseCounts[spec] > 0) {
+        gURICanvases[spec] = canvas;
+    } else {
+        throw "Use counts were computed incorrectly";
+    }
+}
+
+// Recompute drawWindow flags for every drawWindow operation.
+// We have to do this every time since our window can be
+// asynchronously resized (e.g. by the window manager, to make
+// it fit on screen) at unpredictable times.
+// Fortunately this is pretty cheap.
+function DoDrawWindow(ctx, x, y, w, h)
+{
+    var flags = ctx.DRAWWINDOW_DRAW_CARET | ctx.DRAWWINDOW_DRAW_VIEW;
+    var testRect = gBrowser.getBoundingClientRect();
+    if (gIgnoreWindowSize ||
+        (0 <= testRect.left &&
+         0 <= testRect.top &&
+         gContainingWindow.innerWidth >= testRect.right &&
+         gContainingWindow.innerHeight >= testRect.bottom)) {
+        // We can use the window's retained layer manager
+        // because the window is big enough to display the entire
+        // browser element
+        flags |= ctx.DRAWWINDOW_USE_WIDGET_LAYERS;
+    } else if (gBrowserIsRemote) {
+        logger.error(gCurrentURL + " | can't drawWindow remote content");
+        ++gTestResults.Exception;
+    }
+
+    if (gDrawWindowFlags != flags) {
+        // Every time the flags change, dump the new state.
+        gDrawWindowFlags = flags;
+        var flagsStr = "DRAWWINDOW_DRAW_CARET | DRAWWINDOW_DRAW_VIEW";
+        if (flags & ctx.DRAWWINDOW_USE_WIDGET_LAYERS) {
+            flagsStr += " | DRAWWINDOW_USE_WIDGET_LAYERS";
+        } else {
+            // Output a special warning because we need to be able to detect
+            // this whenever it happens.
+            LogWidgetLayersFailure();
+            gFailedUseWidgetLayers = true;
+        }
+        logger.info("drawWindow flags = " + flagsStr +
+                    "; window size = " + gContainingWindow.innerWidth + "," + gContainingWindow.innerHeight +
+                    "; test browser size = " + testRect.width + "," + testRect.height);
+    }
+
+    TestBuffer("DoDrawWindow " + x + "," + y + "," + w + "," + h);
+    ctx.drawWindow(gContainingWindow, x, y, w, h, "rgb(255,255,255)",
+                   gDrawWindowFlags);
+}
+
+function InitCurrentCanvasWithSnapshot()
+{
+    TestBuffer("Initializing canvas snapshot");
+
+    if (gURLs[0].type == TYPE_LOAD || gURLs[0].type == TYPE_SCRIPT) {
+        // We don't want to snapshot this kind of test
+        return false;
+    }
+
+    if (!gCurrentCanvas) {
+        gCurrentCanvas = AllocateCanvas();
+    }
+
+    var ctx = gCurrentCanvas.getContext("2d");
+    DoDrawWindow(ctx, 0, 0, gCurrentCanvas.width, gCurrentCanvas.height);
+    return true;
+}
+
+function UpdateCurrentCanvasForInvalidation(rects)
+{
+    TestBuffer("Updating canvas for invalidation");
+
+    if (!gCurrentCanvas) {
+        return;
+    }
+
+    var ctx = gCurrentCanvas.getContext("2d");
+    for (var i = 0; i < rects.length; ++i) {
+        var r = rects[i];
+        // Set left/top/right/bottom to pixel boundaries
+        var left = Math.floor(r.left);
+        var top = Math.floor(r.top);
+        var right = Math.ceil(r.right);
+        var bottom = Math.ceil(r.bottom);
+
+        // Clamp the values to the canvas size
+        left = Math.max(0, Math.min(left, gCurrentCanvas.width));
+        top = Math.max(0, Math.min(top, gCurrentCanvas.height));
+        right = Math.max(0, Math.min(right, gCurrentCanvas.width));
+        bottom = Math.max(0, Math.min(bottom, gCurrentCanvas.height));
+
+        ctx.save();
+        ctx.translate(left, top);
+        DoDrawWindow(ctx, left, top, right - left, bottom - top);
+        ctx.restore();
+    }
+}
+
+function UpdateWholeCurrentCanvasForInvalidation()
+{
+    TestBuffer("Updating entire canvas for invalidation");
+
+    if (!gCurrentCanvas) {
+        return;
+    }
+
+    var ctx = gCurrentCanvas.getContext("2d");
+    DoDrawWindow(ctx, 0, 0, gCurrentCanvas.width, gCurrentCanvas.height);
+}
+
+function RecordResult(testRunTime, errorMsg, scriptResults)
+{
+    TestBuffer("RecordResult fired");
+
+    // Keep track of which test was slowest, and how long it took.
+    if (testRunTime > gSlowestTestTime) {
+        gSlowestTestTime = testRunTime;
+        gSlowestTestURL  = gCurrentURL;
+    }
+
+    // Not 'const ...' because of 'EXPECTED_*' value dependency.
+    var outputs = {};
+    outputs[EXPECTED_PASS] = {
+        true:  {s: ["PASS", "PASS"], n: "Pass"},
+        false: {s: ["FAIL", "PASS"], n: "UnexpectedFail"}
+    };
+    outputs[EXPECTED_FAIL] = {
+        true:  {s: ["PASS", "FAIL"], n: "UnexpectedPass"},
+        false: {s: ["FAIL", "FAIL"], n: "KnownFail"}
+    };
+    outputs[EXPECTED_RANDOM] = {
+        true:  {s: ["PASS", "PASS"], n: "Random"},
+        false: {s: ["FAIL", "FAIL"], n: "Random"}
+    };
+    outputs[EXPECTED_FUZZY] = outputs[EXPECTED_PASS];
+
+    var output;
+    var extra;
+
+    if (gURLs[0].type == TYPE_LOAD) {
+        ++gTestResults.LoadOnly;
+        logger.testEnd(gURLs[0].identifier, "PASS", "PASS", "(LOAD ONLY)");
+        gCurrentCanvas = null;
+        FinishTestItem();
+        return;
+    }
+    if (gURLs[0].type == TYPE_SCRIPT) {
+        var expected = gURLs[0].expected;
+
+        if (errorMsg) {
+            // Force an unexpected failure to alert the test author to fix the test.
+            expected = EXPECTED_PASS;
+        } else if (scriptResults.length == 0) {
+             // This failure may be due to a JavaScript Engine bug causing
+             // early termination of the test. If we do not allow silent
+             // failure, report an error.
+             if (!gURLs[0].allowSilentFail)
+                 errorMsg = "No test results reported. (SCRIPT)\n";
+             else
+                 logger.info("An expected silent failure occurred");
+        }
+
+        if (errorMsg) {
+            output = outputs[expected][false];
+            extra = { status_msg: output.n };
+            ++gTestResults[output.n];
+            logger.testEnd(gURLs[0].identifier, output.s[0], output.s[1], errorMsg, null, extra);
+            FinishTestItem();
+            return;
+        }
+
+        var anyFailed = scriptResults.some(function(result) { return !result.passed; });
+        var outputPair;
+        if (anyFailed && expected == EXPECTED_FAIL) {
+            // If we're marked as expected to fail, and some (but not all) tests
+            // passed, treat those tests as though they were marked random
+            // (since we can't tell whether they were really intended to be
+            // marked failing or not).
+            outputPair = { true: outputs[EXPECTED_RANDOM][true],
+                           false: outputs[expected][false] };
+        } else {
+            outputPair = outputs[expected];
+        }
+        var index = 0;
+        scriptResults.forEach(function(result) {
+                var output = outputPair[result.passed];
+                var extra = { status_msg: output.n };
+
+                ++gTestResults[output.n];
+                logger.testEnd(gURLs[0].identifier, output.s[0], output.s[1],
+                               result.description + " item " + (++index), null, extra);
+            });
+
+        if (anyFailed && expected == EXPECTED_PASS) {
+            FlushTestBuffer();
+        }
+
+        FinishTestItem();
+        return;
+    }
+
+    if (gURLs[0]["prefSettings" + gState].length == 0 &&
+        gURICanvases[gCurrentURL]) {
+        gCurrentCanvas = gURICanvases[gCurrentURL];
+    }
+    if (gCurrentCanvas == null) {
+        logger.error(gCurrentURL, "program error managing snapshots");
+        ++gTestResults.Exception;
+    }
+    if (gState == 1) {
+        gCanvas1 = gCurrentCanvas;
+    } else {
+        gCanvas2 = gCurrentCanvas;
+    }
+    gCurrentCanvas = null;
+
+    ResetRenderingState();
+
+    switch (gState) {
+        case 1:
+            // First document has been loaded.
+            // Proceed to load the second document.
+
+            CleanUpCrashDumpFiles();
+            StartCurrentURI(2);
+            break;
+        case 2:
+            // Both documents have been loaded. Compare the renderings and see
+            // if the comparison result matches the expected result specified
+            // in the manifest.
+
+            // number of different pixels
+            var differences;
+            // whether the two renderings match:
+            var equal;
+            var maxDifference = {};
+
+            differences = gWindowUtils.compareCanvases(gCanvas1, gCanvas2, maxDifference);
+            equal = (differences == 0);
+
+            // what is expected on this platform (PASS, FAIL, or RANDOM)
+            var expected = gURLs[0].expected;
+
+            if (maxDifference.value > 0 && maxDifference.value <= gURLs[0].fuzzyMaxDelta &&
+                differences <= gURLs[0].fuzzyMaxPixels) {
+                if (equal) {
+                    throw "Inconsistent result from compareCanvases.";
+                }
+                equal = expected == EXPECTED_FUZZY;
+                logger.info("REFTEST fuzzy match");
+            }
+
+            var failedExtraCheck = gFailedNoPaint || gFailedOpaqueLayer || gFailedAssignedLayer;
+
+            // whether the comparison result matches what is in the manifest
+            var test_passed = (equal == (gURLs[0].type == TYPE_REFTEST_EQUAL)) && !failedExtraCheck;
+
+            output = outputs[expected][test_passed];
+            extra = { status_msg: output.n };
+
+            ++gTestResults[output.n];
+
+            // It's possible that we failed both an "extra check" and the normal comparison, but we don't
+            // have a way to annotate these separately, so just print an error for the extra check failures.
+            if (failedExtraCheck) {
+                var failures = [];
+                if (gFailedNoPaint) {
+                    failures.push("failed reftest-no-paint");
+                }
+                // The gFailed*Messages arrays will contain messages from both the test and the reference.
+                if (gFailedOpaqueLayer) {
+                    failures.push("failed reftest-opaque-layer: " + gFailedOpaqueLayerMessages.join(", "));
+                }
+                if (gFailedAssignedLayer) {
+                    failures.push("failed reftest-assigned-layer: " + gFailedAssignedLayerMessages.join(", "));
+                }
+                var failureString = failures.join(", ");
+                logger.testEnd(gURLs[0].identifier, output.s[0], output.s[1], failureString, null, extra);
+            } else {
+                var message = "image comparison";
+                if (!test_passed && expected == EXPECTED_PASS ||
+                    !test_passed && expected == EXPECTED_FUZZY ||
+                    test_passed && expected == EXPECTED_FAIL) {
+                    if (!equal) {
+                        extra.max_difference = maxDifference.value;
+                        extra.differences = differences;
+                        var image1 = gCanvas1.toDataURL();
+                        var image2 = gCanvas2.toDataURL();
+                        extra.reftest_screenshots = [
+                            {url:gURLs[0].identifier[0],
+                             screenshot: image1.slice(image1.indexOf(",") + 1)},
+                            gURLs[0].identifier[1],
+                            {url:gURLs[0].identifier[2],
+                             screenshot: image2.slice(image2.indexOf(",") + 1)}
+                        ];
+                        extra.image1 = image1;
+                        extra.image2 = image2;
+                        message += (", max difference: " + extra.max_difference +
+                                    ", number of differing pixels: " + differences);
+                    } else {
+                        extra.image1 = gCanvas1.toDataURL();
+                    }
+                }
+                logger.testEnd(gURLs[0].identifier, output.s[0], output.s[1], message, null, extra);
+
+                if (gNoCanvasCache) {
+                    ReleaseCanvas(gCanvas1);
+                    ReleaseCanvas(gCanvas2);
+                } else {
+                    if (gURLs[0].prefSettings1.length == 0) {
+                        UpdateCanvasCache(gURLs[0].url1, gCanvas1);
+                    }
+                    if (gURLs[0].prefSettings2.length == 0) {
+                        UpdateCanvasCache(gURLs[0].url2, gCanvas2);
+                    }
+                }
+            }
+
+            if ((!test_passed && expected == EXPECTED_PASS) || (test_passed && expected == EXPECTED_FAIL)) {
+                FlushTestBuffer();
+            }
+
+            CleanUpCrashDumpFiles();
+            FinishTestItem();
+            break;
+        default:
+            throw "Unexpected state.";
+    }
+}
+
+function LoadFailed(why)
+{
+    ++gTestResults.FailedLoad;
+    // Once bug 896840 is fixed, this can go away, but for now it will give log
+    // output that is TBPL starable for bug 789751 and bug 720452.
+    if (!why) {
+        logger.error("load failed with unknown reason");
+    }
+    logger.testEnd(gURLs[0]["url" + gState].spec, "FAIL", "PASS", "load failed: " + why);
+    FlushTestBuffer();
+    FinishTestItem();
+}
+
+function RemoveExpectedCrashDumpFiles()
+{
+    if (gExpectingProcessCrash) {
+        for (let crashFilename of gExpectedCrashDumpFiles) {
+            let file = gCrashDumpDir.clone();
+            file.append(crashFilename);
+            if (file.exists()) {
+                file.remove(false);
+            }
+        }
+    }
+    gExpectedCrashDumpFiles.length = 0;
+}
+
+function FindUnexpectedCrashDumpFiles()
+{
+    if (!gCrashDumpDir.exists()) {
+        return;
+    }
+
+    let entries = gCrashDumpDir.directoryEntries;
+    if (!entries) {
+        return;
+    }
+
+    let foundCrashDumpFile = false;
+    while (entries.hasMoreElements()) {
+        let file = entries.getNext().QueryInterface(CI.nsIFile);
+        let path = String(file.path);
+        if (path.match(/\.(dmp|extra)$/) && !gUnexpectedCrashDumpFiles[path]) {
+            if (!foundCrashDumpFile) {
+                ++gTestResults.UnexpectedFail;
+                foundCrashDumpFile = true;
+                logger.testEnd(gCurrentURL, "FAIL", "PASS", "This test left crash dumps behind, but we weren't expecting it to!");
+            }
+            logger.info("Found unexpected crash dump file " + path);
+            gUnexpectedCrashDumpFiles[path] = true;
+        }
+    }
+}
+
+function CleanUpCrashDumpFiles()
+{
+    RemoveExpectedCrashDumpFiles();
+    FindUnexpectedCrashDumpFiles();
+    gExpectingProcessCrash = false;
+}
+
+function FinishTestItem()
+{
+    // Replace document with BLANK_URL_FOR_CLEARING in case there are
+    // assertions when unloading.
+    logger.debug("Loading a blank page");
+    // After clearing, content will notify us of the assertion count
+    // and tests will continue.
+    SendClear();
+    gFailedNoPaint = false;
+    gFailedOpaqueLayer = false;
+    gFailedOpaqueLayerMessages = [];
+    gFailedAssignedLayer = false;
+    gFailedAssignedLayerMessages = [];
+}
+
+function DoAssertionCheck(numAsserts)
+{
+    if (gDebug.isDebugBuild) {
+        if (gBrowserIsRemote) {
+            // Count chrome-process asserts too when content is out of
+            // process.
+            var newAssertionCount = gDebug.assertionCount;
+            var numLocalAsserts = newAssertionCount - gAssertionCount;
+            gAssertionCount = newAssertionCount;
+
+            numAsserts += numLocalAsserts;
+        }
+
+        var minAsserts = gURLs[0].minAsserts;
+        var maxAsserts = gURLs[0].maxAsserts;
+
+        var expectedAssertions = "expected " + minAsserts;
+        if (minAsserts != maxAsserts) {
+            expectedAssertions += " to " + maxAsserts;
+        }
+        expectedAssertions += " assertions";
+
+        if (numAsserts < minAsserts) {
+            ++gTestResults.AssertionUnexpectedFixed;
+            gDumpFn("REFTEST TEST-UNEXPECTED-PASS | " + gURLs[0].prettyPath +
+                    " | assertion count " + numAsserts + " is less than " +
+                       expectedAssertions + "\n");
+        } else if (numAsserts > maxAsserts) {
+            ++gTestResults.AssertionUnexpected;
+            gDumpFn("REFTEST TEST-UNEXPECTED-FAIL | " + gURLs[0].prettyPath +
+                    " | assertion count " + numAsserts + " is more than " +
+                       expectedAssertions + "\n");
+        } else if (numAsserts != 0) {
+            ++gTestResults.AssertionKnown;
+            gDumpFn("REFTEST TEST-KNOWN-FAIL | " + gURLs[0].prettyPath +
+                    "assertion count " + numAsserts + " matches " +
+                    expectedAssertions + "\n");
+        }
+    }
+
+    if (gURLs[0].chaosMode) {
+        gWindowUtils.leaveChaosMode();
+    }
+
+    // And start the next test.
+    gURLs.shift();
+    StartCurrentTest();
+}
+
+function ResetRenderingState()
+{
+    SendResetRenderingState();
+    // We would want to clear any viewconfig here, if we add support for it
+}
+
+function RestoreChangedPreferences()
+{
+    if (gPrefsToRestore.length > 0) {
+        var prefs = Components.classes["@mozilla.org/preferences-service;1"].
+                    getService(Components.interfaces.nsIPrefBranch);
+        gPrefsToRestore.reverse();
+        gPrefsToRestore.forEach(function(ps) {
+            var value = ps.value;
+            if (ps.type == PREF_BOOLEAN) {
+                prefs.setBoolPref(ps.name, value);
+            } else if (ps.type == PREF_STRING) {
+                prefs.setCharPref(ps.name, value);
+                value = '"' + value + '"';
+            } else if (ps.type == PREF_INTEGER) {
+                prefs.setIntPref(ps.name, value);
+            }
+            logger.info("RESTORE PREFERENCE pref(" + ps.name + "," + value + ")");
+        });
+        gPrefsToRestore = [];
+    }
+}
+
+function RegisterMessageListenersAndLoadContentScript()
+{
+    gBrowserMessageManager.addMessageListener(
+        "reftest:AssertionCount",
+        function (m) { RecvAssertionCount(m.json.count); }
+    );
+    gBrowserMessageManager.addMessageListener(
+        "reftest:ContentReady",
+        function (m) { return RecvContentReady(m.data); }
+    );
+    gBrowserMessageManager.addMessageListener(
+        "reftest:Exception",
+        function (m) { RecvException(m.json.what) }
+    );
+    gBrowserMessageManager.addMessageListener(
+        "reftest:FailedLoad",
+        function (m) { RecvFailedLoad(m.json.why); }
+    );
+    gBrowserMessageManager.addMessageListener(
+        "reftest:FailedNoPaint",
+        function (m) { RecvFailedNoPaint(); }
+    );
+    gBrowserMessageManager.addMessageListener(
+        "reftest:FailedOpaqueLayer",
+        function (m) { RecvFailedOpaqueLayer(m.json.why); }
+    );
+    gBrowserMessageManager.addMessageListener(
+        "reftest:FailedAssignedLayer",
+        function (m) { RecvFailedAssignedLayer(m.json.why); }
+    );
+    gBrowserMessageManager.addMessageListener(
+        "reftest:InitCanvasWithSnapshot",
+        function (m) { return RecvInitCanvasWithSnapshot(); }
+    );
+    gBrowserMessageManager.addMessageListener(
+        "reftest:Log",
+        function (m) { RecvLog(m.json.type, m.json.msg); }
+    );
+    gBrowserMessageManager.addMessageListener(
+        "reftest:ScriptResults",
+        function (m) { RecvScriptResults(m.json.runtimeMs, m.json.error, m.json.results); }
+    );
+    gBrowserMessageManager.addMessageListener(
+        "reftest:TestDone",
+        function (m) { RecvTestDone(m.json.runtimeMs); }
+    );
+    gBrowserMessageManager.addMessageListener(
+        "reftest:UpdateCanvasForInvalidation",
+        function (m) { RecvUpdateCanvasForInvalidation(m.json.rects); }
+    );
+    gBrowserMessageManager.addMessageListener(
+        "reftest:UpdateWholeCanvasForInvalidation",
+        function (m) { RecvUpdateWholeCanvasForInvalidation(); }
+    );
+    gBrowserMessageManager.addMessageListener(
+        "reftest:ExpectProcessCrash",
+        function (m) { RecvExpectProcessCrash(); }
+    );
+
+    gBrowserMessageManager.loadFrameScript("chrome://reftest/content/reftest-content.js", true, true);
+}
+
+function RecvAssertionCount(count)
+{
+    DoAssertionCheck(count);
+}
+
+function RecvContentReady(info)
+{
+    gContentGfxInfo = info.gfx;
+    InitAndStartRefTests();
+    return { remote: gBrowserIsRemote };
+}
+
+function RecvException(what)
+{
+    logger.error(gCurrentURL + " | " + what);
+    ++gTestResults.Exception;
+}
+
+function RecvFailedLoad(why)
+{
+    LoadFailed(why);
+}
+
+function RecvFailedNoPaint()
+{
+    gFailedNoPaint = true;
+}
+
+function RecvFailedOpaqueLayer(why) {
+    gFailedOpaqueLayer = true;
+    gFailedOpaqueLayerMessages.push(why);
+}
+
+function RecvFailedAssignedLayer(why) {
+    gFailedAssignedLayer = true;
+    gFailedAssignedLayerMessages.push(why);
+}
+
+function RecvInitCanvasWithSnapshot()
+{
+    var painted = InitCurrentCanvasWithSnapshot();
+    return { painted: painted };
+}
+
+function RecvLog(type, msg)
+{
+    msg = "[CONTENT] " + msg;
+    if (type == "info") {
+        TestBuffer(msg);
+    } else if (type == "warning") {
+        logger.warning(msg);
+    } else {
+        logger.error("REFTEST TEST-UNEXPECTED-FAIL | " + gCurrentURL + " | unknown log type " + type + "\n");
+        ++gTestResults.Exception;
+    }
+}
+
+function RecvScriptResults(runtimeMs, error, results)
+{
+    RecordResult(runtimeMs, error, results);
+}
+
+function RecvTestDone(runtimeMs)
+{
+    RecordResult(runtimeMs, '', [ ]);
+}
+
+function RecvUpdateCanvasForInvalidation(rects)
+{
+    UpdateCurrentCanvasForInvalidation(rects);
+}
+
+function RecvUpdateWholeCanvasForInvalidation()
+{
+    UpdateWholeCurrentCanvasForInvalidation();
+}
+
+function OnProcessCrashed(subject, topic, data)
+{
+    var id;
+    subject = subject.QueryInterface(CI.nsIPropertyBag2);
+    if (topic == "plugin-crashed") {
+        id = subject.getPropertyAsAString("pluginDumpID");
+    } else if (topic == "ipc:content-shutdown") {
+        id = subject.getPropertyAsAString("dumpID");
+    }
+    if (id) {
+        gExpectedCrashDumpFiles.push(id + ".dmp");
+        gExpectedCrashDumpFiles.push(id + ".extra");
+    }
+}
+
+function RegisterProcessCrashObservers()
+{
+    var os = CC[NS_OBSERVER_SERVICE_CONTRACTID]
+             .getService(CI.nsIObserverService);
+    os.addObserver(OnProcessCrashed, "plugin-crashed", false);
+    os.addObserver(OnProcessCrashed, "ipc:content-shutdown", false);
+}
+
+function RecvExpectProcessCrash()
+{
+    gExpectingProcessCrash = true;
+}
+
+function SendClear()
+{
+    gBrowserMessageManager.sendAsyncMessage("reftest:Clear");
+}
+
+function SendLoadScriptTest(uri, timeout)
+{
+    gBrowserMessageManager.sendAsyncMessage("reftest:LoadScriptTest",
+                                            { uri: uri, timeout: timeout });
+}
+
+function SendLoadTest(type, uri, timeout)
+{
+    gBrowserMessageManager.sendAsyncMessage("reftest:LoadTest",
+                                            { type: type, uri: uri, timeout: timeout }
+    );
+}
+
+function SendResetRenderingState()
+{
+    gBrowserMessageManager.sendAsyncMessage("reftest:ResetRenderingState");
+}