[DevTools] Explicitly enable/disable Page.viewportChanged protocol event.

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 72 matching lines @@
         delete this._cachedCssWidth;
         delete this._cachedZoomFactor;
         delete this._cachedViewport;
         delete this._cachedDrawContentsSize;
         delete this._availableSize;
     },
 
     _emulationEnabledChanged: function()
     {
         var enabled = WebInspector.overridesSupport.emulationEnabled();
+        WebInspector.resourceTreeModel.setViewportChangedEventEnabled(enabled);

[pfeldman, 2014/07/01 15:36:29]

Could we reuse existing event for that instead?

[dgozman, 2014/07/01 16:26:15]

Done.

         this._mediaInspector.setEnabled(enabled);
         if (enabled && !this._enabled) {
             this._invalidateCache();
             this._ignoreResize = true;
             this._enabled = true;
             this._inspectedPagePlaceholder.clearMinimumSizeAndMargins();
             this._inspectedPagePlaceholder.show(this._pageContainer);
             this._responsiveDesignContainer.show(this.element);
             delete this._ignoreResize;
             this.onResize();
@@ skipping 500 matching lines @@
      * @param {!WebInspector.Throttler.FinishCallback} finishCallback
      */
     _updateUIThrottled: function(finishCallback)
     {
         this._updateUI();
         finishCallback();
     },
 
     __proto__: WebInspector.VBox.prototype
 };