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

Source/devtools/front_end/DOMStorageItemsView.js

Index: Source/devtools/front_end/DOMStorageItemsView.js
diff --git a/Source/devtools/front_end/DOMStorageItemsView.js b/Source/devtools/front_end/DOMStorageItemsView.js
index e9f652fe48d2ef6791bf5e4ef6b7c3c98847334a..5d94705b053e1331002de02789d492b814eaae3b 100644
--- a/Source/devtools/front_end/DOMStorageItemsView.js
+++ b/Source/devtools/front_end/DOMStorageItemsView.js
@@ -68,6 +68,26 @@ WebInspector.DOMStorageItemsView.prototype = {
     },
 
     /**
+     * @param {KeyboardEvent} event
+     */
+    handleShortcut: function(event)
+    {
+        if (WebInspector.KeyboardShortcut.eventHasCtrlOrMeta(event) && !event.shiftKey && event.keyIdentifier === "U+005A") { // Z key
+            this.domStorage.undo();
+            event.handled = true;
+            return;
+        }
+
+        var isRedoKey = WebInspector.isMac() ? event.metaKey && event.shiftKey && event.keyIdentifier === "U+005A" : // Z key
+                                               event.ctrlKey && event.keyIdentifier === "U+0059"; // Y key
+        if (isRedoKey) {
+            this.domStorage.redo();
+            event.handled = true;
+            return;
+        }
+    },
+
+    /**
      * @param {WebInspector.Event} event
      */
     _domStorageItemsCleared: function(event)