[DevTools] Limit responsive design resize request to width/height only.

Source/devtools/front_end/ResponsiveDesignView.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.
 
 /**
  * @constructor
  * @extends {WebInspector.VBox}
  * @implements {WebInspector.OverridesSupport.PageResizer}
  * @param {!WebInspector.InspectedPagePlaceholder} inspectedPagePlaceholder
  */
@@ skipping 155 matching lines @@
     /**
      * @param {!WebInspector.Event} event
      */
     _onResizeUpdate: function(event)
     {
         if (event.data.shiftKey !== !!this._slowPositionStart)
             this._slowPositionStart = event.data.shiftKey ? event.data.currentPosition : null;
         var cssOffset = this._slowPositionStart ? (event.data.currentPosition - this._slowPositionStart) / 10 + this._slowPositionStart - event.data.startPosition : event.data.currentPosition - event.data.startPosition;
         var dipOffset = Math.round(cssOffset * WebInspector.zoomManager.zoomFactor());
         var newSize = Math.max(this._resizeStartSize + dipOffset, 1);
-        var requested = new Size(this._dipWidth, this._dipHeight);
+        var requested = {};
         if (event.target.isVertical())
             requested.height = newSize;
         else
             requested.width = newSize;
         this.dispatchEventToListeners(WebInspector.OverridesSupport.PageResizer.Events.ResizeRequested, requested);
     },
 
     /**
      * @param {!WebInspector.Event} event
      */
@@ skipping 317 matching lines @@
         if (this._warningMessage.textContent === message)
             return;
         this._warningMessage.classList.toggle("hidden", !message);
         this._warningMessage.textContent = message;
         this._invalidateCache();
         this.onResize();
     },
 
     __proto__: WebInspector.VBox.prototype
 };