[DevTools] Handle emulated device scale factor and original device scale factor properly.

third_party/WebKit/Source/devtools/front_end/devtools.js

 // Copyright 2014 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.
 
 (function(window) {
 
 // DevToolsAPI ----------------------------------------------------------------
 
 /**
  * @constructor
@@ skipping 382 matching lines @@
         DevToolsAPI.sendMessageToEmbedder("setIsDocked", [isDocked], callback);
     },
 
     /**
      * Requests inspected page to be placed atop of the inspector frontend with specified bounds.
      * @override
      * @param {{x: number, y: number, width: number, height: number}} bounds
      */
     setInspectedPageBounds: function(bounds)
     {
-        var converted = {
-          x: Math.round(DevToolsHost.convertLengthForEmbedder(bounds.x)),
-          y: Math.round(DevToolsHost.convertLengthForEmbedder(bounds.y)),
-          width: Math.round(DevToolsHost.convertLengthForEmbedder(bounds.width)),
-          height: Math.round(DevToolsHost.convertLengthForEmbedder(bounds.height))
-        };
-        DevToolsAPI.sendMessageToEmbedder("setInspectedPageBounds", [converted], null);
+        DevToolsAPI.sendMessageToEmbedder("setInspectedPageBounds", [bounds], null);
     },
 
     /**
      * @override
      */
     inspectElementCompleted: function()
     {
         DevToolsAPI.sendMessageToEmbedder("inspectElementCompleted", [], null);
     },
 
@@ skipping 639 matching lines @@
 
 if (!DOMTokenList.prototype.__originalDOMTokenListToggle) {
     DOMTokenList.prototype.__originalDOMTokenListToggle = DOMTokenList.prototype.toggle;
     DOMTokenList.prototype.toggle = function(token, force)
     {
         if (arguments.length === 1)
             force = !this.contains(token);
         return this.__originalDOMTokenListToggle(token, !!force);
     }
 }