Remove ExtensionMessageService's legacy support for devtools.

chrome/browser/profiles/profile_impl.h

 // Copyright (c) 2012 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 class gathers state related to a single user profile.
 
 #ifndef CHROME_BROWSER_PROFILES_PROFILE_IMPL_H_
 #define CHROME_BROWSER_PROFILES_PROFILE_IMPL_H_
 #pragma once
 
@@ skipping 200 matching lines @@
   scoped_ptr<ExtensionService> extension_service_;
   scoped_refptr<UserScriptMaster> user_script_master_;
   scoped_refptr<ExtensionDevToolsManager> extension_devtools_manager_;
   // extension_info_map_ needs to outlive extension_process_manager_.
   scoped_refptr<ExtensionInfoMap> extension_info_map_;
   // |extension_process_manager_| must be destroyed before |io_data_|.
   // While |extension_process_manager_| still lives, we handle incoming
   // resource requests from extension processes and those require access
   // to the ResourceContext owned by |io_data_|.
   scoped_ptr<ExtensionProcessManager> extension_process_manager_;
-  scoped_refptr<ExtensionMessageService> extension_message_service_;
+  scoped_ptr<ExtensionMessageService> extension_message_service_;
   scoped_ptr<ExtensionEventRouter> extension_event_router_;
   scoped_ptr<ExtensionNavigationObserver> extension_navigation_observer_;
   scoped_refptr<ExtensionSpecialStoragePolicy>
       extension_special_storage_policy_;
   scoped_ptr<NetPrefObserver> net_pref_observer_;
   scoped_ptr<TemplateURLFetcher> template_url_fetcher_;
   scoped_ptr<BookmarkModel> bookmark_bar_model_;
   scoped_refptr<PromoResourceService> promo_resource_service_;
   scoped_refptr<ProtocolHandlerRegistry> protocol_handler_registry_;
 
@@ skipping 64 matching lines @@
   Profile::Delegate* delegate_;
 
   chrome_browser_net::Predictor* predictor_;
 
   bool session_restore_enabled_;
 
   DISALLOW_COPY_AND_ASSIGN(ProfileImpl);
 };
 
 #endif  // CHROME_BROWSER_PROFILES_PROFILE_IMPL_H_