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diff --git a/layout/generic/test/test_movement_by_characters.html b/layout/generic/test/test_movement_by_characters.html
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+++ b/layout/generic/test/test_movement_by_characters.html
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+<!DOCTYPE HTML>
+<html>
+<head>
+  <title>Test Character Movement (including nsTextFrame::PeekOffsetCharacter)</title>
+  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
+  <script type="application/javascript" src="/tests/SimpleTest/EventUtils.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body>
+<p id="display"></p>
+<div id="content" style="display: block">
+<div contentEditable id="editor"></div>
+</div>
+<pre id="test">
+<script class="testbody" type="text/javascript;version=1.7">
+
+SimpleTest.waitForExplicitFinish();
+
+if (navigator.userAgent.indexOf("Windows NT 6.2") >= 0) {
+  todo(false, "Too many intermittent failures on Windows 8 (bug 886781)");
+  SimpleTest.finish();
+} else {
+  setTimeout(focusing, 0);
+}
+
+function focusing() {
+  document.getElementById("editor").focus();
+  // This seems to be necessary because the selection is not set up properly otherwise
+  setTimeout(test, 0);
+}
+
+function test() {
+  var sel = window.getSelection();
+  var editor = document.getElementById("editor");
+
+  function testRight(node, offset) {
+    synthesizeKey("VK_RIGHT", {});
+    is(sel.anchorNode, node, "Right movement broken in " + editor.innerHTML);
+    is(sel.anchorOffset, offset, "Right movement broken in " + editor.innerHTML);
+  }
+
+  function testLeft(node, offset) {
+    synthesizeKey("VK_LEFT", {});
+    is(sel.anchorNode, node, "Left movement broken in " + editor.innerHTML);
+    is(sel.anchorOffset, offset, "Left movement broken in " + editor.innerHTML);
+  }
+
+  editor.innerHTML = "H K";
+  sel.collapse(editor.firstChild, 0);
+  testRight(editor.firstChild, 1);
+  testRight(editor.firstChild, 2);
+  testRight(editor.firstChild, 3);
+  testLeft(editor.firstChild, 2);
+  testLeft(editor.firstChild, 1);
+  testLeft(editor.firstChild, 0);
+
+  editor.innerHTML = "<b>H</b> K";
+  sel.collapse(editor.firstChild.firstChild, 0);
+  testRight(editor.firstChild.firstChild, 1);
+  testRight(editor.firstChild.nextSibling, 1);
+  testRight(editor.firstChild.nextSibling, 2);
+  testLeft(editor.firstChild.nextSibling, 1);
+  testLeft(editor.firstChild.nextSibling, 0);
+  testLeft(editor.firstChild.firstChild, 0);
+
+  editor.innerHTML = "H <br>K";
+  sel.collapse(editor.firstChild, 0);
+  testRight(editor.firstChild, 1);
+  testRight(editor.firstChild, 2);
+  testRight(editor.firstChild.nextSibling.nextSibling, 0);
+  testRight(editor.firstChild.nextSibling.nextSibling, 1);
+  testLeft(editor.firstChild.nextSibling.nextSibling, 0);
+  testLeft(editor.firstChild, 2);
+  testLeft(editor.firstChild, 1);
+  testLeft(editor.firstChild, 0);
+
+  editor.innerHTML = "<pre>aa\nbb</pre>";
+  sel.collapse(editor.firstChild.firstChild, 0);
+  testRight(editor.firstChild.firstChild, 1);
+  // at the end of the first line, before the \n
+  testRight(editor.firstChild.firstChild, 2);
+  testRight(editor.firstChild.firstChild, 3);
+  testRight(editor.firstChild.firstChild, 4);
+  testLeft(editor.firstChild.firstChild, 3);
+  // at the end of the first line, before the \n
+  testLeft(editor.firstChild.firstChild, 2);
+  testLeft(editor.firstChild.firstChild, 1);
+  testLeft(editor.firstChild.firstChild, 0);
+
+  SimpleTest.finish();
+}
+
+
+</script>
+</pre>
+</body>
+</html>