Extensions: Split extensions utility IPC messages into its own file.

chrome/browser/browser_process_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.
 
 // 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 176 matching lines @@
   bool created_local_state_;
   scoped_ptr<PrefService> local_state_;
 
   bool created_icon_manager_;
   scoped_ptr<IconManager> icon_manager_;
 
   scoped_ptr<GLStringManager> gl_string_manager_;
 
   scoped_ptr<GpuModeManager> gpu_mode_manager_;
 
+#if defined(ENABLE_EXTENSIONS)
   scoped_ptr<extensions::ExtensionsBrowserClient> extensions_browser_client_;
+#endif
   scoped_refptr<extensions::EventRouterForwarder>
       extension_event_router_forwarder_;
 
 #if !defined(OS_ANDROID)
   scoped_ptr<RemoteDebuggingServer> remote_debugging_server_;
 #endif
 
 #if !defined(OS_ANDROID) && !defined(OS_IOS)
   scoped_ptr<MediaFileSystemRegistry> media_file_system_registry_;
 #endif
@@ skipping 84 matching lines @@
 #endif
 
   scoped_ptr<network_time::NetworkTimeTracker> network_time_tracker_;
 
   scoped_ptr<gcm::GCMDriver> gcm_driver_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserProcessImpl);
 };
 
 #endif  // CHROME_BROWSER_BROWSER_PROCESS_IMPL_H_