[Devtools] Restructured contextMenu for DataGrid.

third_party/WebKit/Source/devtools/front_end/resources/ServiceWorkerCacheViews.js

 // Copyright 2014 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.SimpleView}
  * @param {!WebInspector.ServiceWorkerCacheModel} model
  * @param {!WebInspector.ServiceWorkerCacheModel.Cache} cache
  */
@@ skipping 57 matching lines @@
     {
         this._skipCount = this._skipCount + this._pageSize;
         this._updateData(false);
     },
 
     /**
      * @param {!WebInspector.DataGridNode} node
      */
     _deleteButtonClicked: function(node)
     {
-        this._model.deleteCacheEntry(this._cache, node.data["request"], node.remove.bind(node));
+        this._model.deleteCacheEntry(this._cache, /** @type {string} */ (node.data["request"]), node.remove.bind(node));
     },
 
     /**
      * @param {!WebInspector.ServiceWorkerCacheModel.Cache} cache
      */
     update: function(cache)
     {
         this._cache = cache;
 
         if (this._dataGrid)
@@ skipping 64 matching lines @@
     },
 
     clear: function()
     {
         this._dataGrid.rootNode().removeChildren();
         this._entries = [];
     },
 
     __proto__: WebInspector.SimpleView.prototype
 };