[DevTools] Promote Device Mode v2 to default experiments.

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

 /*
  * Copyright (C) 2006, 2007, 2008 Apple Inc.  All rights reserved.
  * Copyright (C) 2007 Matt Lilek (pewtermoose@gmail.com).
  * Copyright (C) 2009 Joseph Pecoraro
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
@@ skipping 150 matching lines @@
                 Runtime.experiments.enableForTest("animationInspection");
             if (testPath.indexOf("layers/") !== -1)
                 Runtime.experiments.enableForTest("layersPanel");
             if (testPath.indexOf("timeline/") !== -1 || testPath.indexOf("layers/") !== -1)
                 Runtime.experiments.enableForTest("layersPanel");
             if (testPath.indexOf("security/") !== -1)
                 Runtime.experiments.enableForTest("securityPanel");
         }
 
         Runtime.experiments.setDefaultExperiments([
+            "deviceMode",
             "securityPanel"
         ]);
     },
 
     /**
      * @suppressGlobalPropertiesCheck
      */
     _createAppUI: function()
     {
         console.timeStamp("Main._createApp");
@@ skipping 903 matching lines @@
      */
     willHide: function()
     {
         this._hideCallback.call(null);
     },
 
     __proto__: WebInspector.VBox.prototype
 }
 
 new WebInspector.Main();