DevTools: Implement undo, redo operations for the DOMStorage views.

Source/devtools/front_end/ResourcesPanel.js

 /*
  * Copyright (C) 2007, 2008, 2010 Apple Inc.  All rights reserved.
  * Copyright (C) 2009 Joseph Pecoraro
  * Copyright (C) 2013 Samsung Electronics. All rights reserved.
  *
  * 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 117 matching lines @@
     {
         return [this.storageViewStatusBarItemsContainer];
     },
 
     wasShown: function()
     {
         WebInspector.Panel.prototype.wasShown.call(this);
         this._initialize();
     },
 
+    /**
+     * @param {KeyboardEvent} event
+     */
+    handleShortcut: function(event)
+    {
+        if (this.visibleView && typeof this.visibleView.handleShortcut === "function")
+            return this.visibleView.handleShortcut(event);
+    },
+
     _initialize: function()
     {
         if (!this._initialized && this.isShowing() && this._cachedResourcesWereLoaded) {
             this._populateResourceTree();
             this._populateDOMStorageTree();
             this._populateApplicationCacheTree();
             this._initDefaultSelection();
             this._initialized = true;
         }
     },
@@ skipping 2208 matching lines @@
      */
     _lastTreeElement: function()
     {
         var treeElement = this._root;
         var nextTreeElement;
         while (nextTreeElement = this._traverseNext(treeElement))
             treeElement = nextTreeElement;
         return treeElement;
     }
 }