[Extensions] Update last_error.js, send_request.js

extensions/renderer/resources/context_menus_handlers.js

 // Copyright 2015 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.
 
 // Implementation of custom bindings for the contextMenus API.
 // This is used to implement the contextMenus API for extensions and for the
 // <webview> tag (see chrome_web_view_experimental.js).
 
 var contextMenuNatives = requireNative('context_menus');
 var sendRequest = require('sendRequest').sendRequest;
@@ skipping 70 matching lines @@
 
       var id = info.menuItemId;
       var onclick = contextMenus.handlersForId(instanceId, id)[id];
       if (onclick) {
         $Function.apply(onclick, null, arguments);
       }
     });
   };
 
   // To be used with apiFunctions.setHandleRequest
-  var requestHandlers = {};
+  var requestHandlers = { __proto__: null };
   // To be used with apiFunctions.setCustomCallback
-  var callbacks = {};
+  var callbacks = { __proto__: null };
 
   requestHandlers.create = function() {
     var createProperties = isWebview ? arguments[1] : arguments[0];
     createProperties.generatedId = contextMenuNatives.GetNextContextMenuId();
     var optArgs = {
+      __proto__: null,
       customCallback: this.customCallback,
     };
     sendRequest(this.name, arguments, this.definition.parameters, optArgs);
     return contextMenus.getIdFromCreateProperties(createProperties);
   };
 
   callbacks.create =
       createCustomCallback(function(instanceId, createProperties) {
     var id = contextMenus.getIdFromCreateProperties(createProperties);
     var onclick = createProperties.onclick;
@@ skipping 23 matching lines @@
     delete contextMenus.handlers[instanceId];
   });
 
   return {
     requestHandlers: requestHandlers,
     callbacks: callbacks
   };
 }
 
 exports.$set('create', createContextMenusHandlers);