No need to have DevToolsManager reference counted

chrome/browser/browser_process_impl.h

 // Copyright (c) 2011 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.
 
 // When each service is created, we set a flag indicating this. At this point,
 // the service initialization could fail or succeed. This allows us to remember
 // if we tried to create a service, and not try creating it over and over if
 // the creation failed.
 
 #ifndef CHROME_BROWSER_BROWSER_PROCESS_IMPL_H_
@@ skipping 205 matching lines @@
   scoped_ptr<IconManager> icon_manager_;
 
   scoped_refptr<ExtensionEventRouterForwarder>
       extension_event_router_forwarder_;
 
   scoped_ptr<RemoteDebuggingServer> remote_debugging_server_;
 
   scoped_refptr<DevToolsProtocolHandler> devtools_legacy_handler_;
 
   bool created_devtools_manager_;
-  scoped_refptr<DevToolsManager> devtools_manager_;
+  scoped_ptr<DevToolsManager> devtools_manager_;
 
   bool created_sidebar_manager_;
   scoped_refptr<SidebarManager> sidebar_manager_;
 
   bool created_browser_policy_connector_;
   scoped_ptr<policy::BrowserPolicyConnector> browser_policy_connector_;
 
   scoped_refptr<printing::PrintPreviewTabController>
       print_preview_tab_controller_;
 
@@ skipping 87 matching lines @@
   scoped_refptr<GpuBlacklistUpdater> gpu_blacklist_updater_;
 
 #if !defined(OS_CHROMEOS)
   scoped_ptr<ComponentUpdateService> component_updater_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(BrowserProcessImpl);
 };
 
 #endif  // CHROME_BROWSER_BROWSER_PROCESS_IMPL_H_