[DevTools] Small cleanup after device mode v2.

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

 // Copyright 2015 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}
  */
 WebInspector.DeviceModeView = function()
 {
@@ skipping 308 matching lines @@
         if (this.isShowing())
             this._contentAreaResized();
     },
 
     /**
      * @override
      */
     wasShown: function()
     {
         this._measureHandles();
-        this._mediaInspector.setEnabled(true);
         this._toolbar.restore();
     },
 
     /**
      * @override
      */
     willHide: function()
     {
         this._model.emulate(WebInspector.DeviceModeModel.Type.None, null, null);
-        this._mediaInspector.setEnabled(false);
     },
 
     __proto__: WebInspector.VBox.prototype
 }
 
 /**
  * @constructor
  * @extends {WebInspector.VBox}
  * @param {boolean} horizontal
  * @param {function(number)} applyCallback
@@ skipping 92 matching lines @@
     /**
      * @param {number} size
      */
     _onMarkerClick: function(size)
     {
         this._applyCallback.call(null, size);
     },
 
     __proto__: WebInspector.VBox.prototype
 }