[DevTools] Add dialog type and return value to Page.javascriptDialog{Opening,Closed}.

Source/devtools/front_end/sdk/ResourceTreeModel.js

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 848 matching lines @@
      * @override
      */
     frameResized: function()
     {
         this._resourceTreeModel.dispatchEventToListeners(WebInspector.ResourceTreeModel.EventTypes.FrameResized, null);
     },
 
     /**
      * @override
      * @param {string} message
+     * @param {string} dialogType
      */
-    javascriptDialogOpening: function(message)
+    javascriptDialogOpening: function(message, dialogType)
     {
     },
 
     /**
      * @override
+     * @param {boolean} result
      */
-    javascriptDialogClosed: function()
+    javascriptDialogClosed: function(result)
     {
     },
 
     /**
      * @override
      * @param {string} data
      * @param {!PageAgent.ScreencastFrameMetadata=} metadata
      * @param {number=} frameNumber
      */
     screencastFrame: function(data, metadata, frameNumber)
@@ skipping 28 matching lines @@
     },
 
     /**
      * @override
      */
     interstitialHidden: function()
     {
         // Frontend is not interested in interstitials.
     }
 }