1 files changed, 0 insertions, 65 deletions
diff --git a/browser/components/customizableui/ScrollbarSampler.jsm b/browser/components/customizableui/ScrollbarSampler.jsm
deleted file mode 100644
index 44736e4c4..000000000
--- a/browser/components/customizableui/ScrollbarSampler.jsm
+++ /dev/null
@@ -1,65 +0,0 @@
-/* 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/. */
-
-"use strict";
-
-this.EXPORTED_SYMBOLS = ["ScrollbarSampler"];
-
-const {classes: Cc, interfaces: Ci, utils: Cu, results: Cr} = Components;
-
-Cu.import("resource://gre/modules/Services.jsm");
-Cu.import("resource://gre/modules/XPCOMUtils.jsm");
-
-var gSystemScrollbarWidth = null;
-
-this.ScrollbarSampler = {
-  getSystemScrollbarWidth: function() {
-    if (gSystemScrollbarWidth !== null) {
-      return Promise.resolve(gSystemScrollbarWidth);
-    }
-
-    return new Promise(resolve => {
-      this._sampleSystemScrollbarWidth().then(function(systemScrollbarWidth) {
-        gSystemScrollbarWidth = systemScrollbarWidth;
-        resolve(gSystemScrollbarWidth);
-      });
-    });
-  },
-
-  resetSystemScrollbarWidth: function() {
-    gSystemScrollbarWidth = null;
-  },
-
-  _sampleSystemScrollbarWidth: function() {
-    let hwin = Services.appShell.hiddenDOMWindow;
-    let hdoc = hwin.document.documentElement;
-    let iframe = hwin.document.createElementNS("http://www.w3.org/1999/xhtml",
-                                               "html:iframe");
-    iframe.setAttribute("srcdoc", '<body style="overflow-y: scroll"></body>');
-    hdoc.appendChild(iframe);
-
-    let cwindow = iframe.contentWindow;
-    let utils = cwindow.QueryInterface(Ci.nsIInterfaceRequestor)
-                       .getInterface(Ci.nsIDOMWindowUtils);
-
-    return new Promise(resolve => {
-      cwindow.addEventListener("load", function onLoad(aEvent) {
-        cwindow.removeEventListener("load", onLoad);
-        let sbWidth = {};
-        try {
-          utils.getScrollbarSize(true, sbWidth, {});
-        } catch (e) {
-          Cu.reportError("Could not sample scrollbar size: " + e + " -- " +
-                         e.stack);
-          sbWidth.value = 0;
-        }
-        // Minimum width of 10 so that we have enough padding:
-        sbWidth.value = Math.max(sbWidth.value, 10);
-        resolve(sbWidth.value);
-        iframe.remove();
-      });
-    });
-  }
-};
-Object.freeze(this.ScrollbarSampler);