Fix AutomationProvider from logging false errors by replacing the persistent

chrome/browser/automation/automation_provider.h

 // Copyright (c) 2010 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.
 
 // This implements a browser-side endpoint for UI automation activity.
 // The client-side endpoint is implemented by AutomationProxy.
 // The entire lifetime of this object should be contained within that of
 // the BrowserProcess, and in particular the NotificationService that's
 // hung off of it.
 
@@ skipping 371 matching lines @@
   void OnSetZoomLevel(int handle, int zoom_level);
 
   ExternalTabContainer* GetExternalTabForHandle(int handle);
 #endif  // defined(OS_WIN)
 
   typedef std::map<int, ExtensionPortContainer*> PortContainerMap;
 
   scoped_ptr<IPC::ChannelProxy> channel_;
   scoped_ptr<NotificationObserver> new_tab_ui_load_observer_;
   scoped_ptr<NotificationObserver> find_in_page_observer_;
-  scoped_ptr<NotificationObserver> dom_operation_observer_;
   scoped_ptr<ExtensionTestResultNotificationObserver>
       extension_test_result_observer_;
   scoped_ptr<AutomationExtensionTracker> extension_tracker_;
   PortContainerMap port_containers_;
 
   // True iff connected to an AutomationProxy.
   bool is_connected_;
 
   // True iff browser finished loading initial set of tabs.
   bool initial_loads_complete_;
 
   // ID of automation channel.
   std::string channel_id_;
 
   DISALLOW_COPY_AND_ASSIGN(AutomationProvider);
 };
 
 #endif  // CHROME_BROWSER_AUTOMATION_AUTOMATION_PROVIDER_H_