Compile chrome://settings, part 6

chrome/browser/resources/options/chromeos/display_options.js

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 cr.exportPath('options');
 
 /**
  * @typedef {{
  *   availableColorProfiles: Array.<{profileId: number, name: string}>,
  *   colorProfile: number,
@@ skipping 256 matching lines @@
      * @private
      */
     onMouseDown_: function(e) {
       if (this.mirroring_)
         return true;
 
       if (e.button != 0)
         return true;
 
       e.preventDefault();
-      return this.startDragging_(e.target, {x: e.pageX, y: e.pageY});
+      var target = assertInstanceof(e.target, HTMLElement);
+      return this.startDragging_(target, {x: e.pageX, y: e.pageY});
     },
 
     /**
      * Touch start handler for dragging display rectangle.
      * @param {Event} e The touch start event.
      * @private
      */
     onTouchStart_: function(e) {
       if (this.mirroring_)
         return true;
 
       if (e.touches.length != 1)
         return false;
 
       e.preventDefault();
       var touch = e.touches[0];
       this.lastTouchLocation_ = {x: touch.pageX, y: touch.pageY};
-      return this.startDragging_(e.target, this.lastTouchLocation_);
+      var target = assertInstanceof(e.target, HTMLElement);
+      return this.startDragging_(target, this.lastTouchLocation_);
     },
 
     /**
      * Collects the current data and sends it to Chrome.
      * @private
      */
     applyResult_: function() {
       // Offset is calculated from top or left edge.
       var primary = this.primaryDisplay_;
       var secondary = this.secondaryDisplay_;
@@ skipping 603 matching lines @@
       mirroring, displays, layout, offset) {
     DisplayOptions.getInstance().onDisplayChanged_(
         mirroring, displays, layout, offset);
   };
 
   // Export
   return {
     DisplayOptions: DisplayOptions
   };
 });