Split ExtensionSystem interface from ExtensionSystemImpl implementation, part 1.

chrome/browser/extensions/signin/gaia_auth_extension_loader.cc

 // Copyright 2013 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.
 
 #include "chrome/browser/extensions/signin/gaia_auth_extension_loader.h"
 
 #include "base/command_line.h"
 #include "chrome/browser/extensions/component_loader.h"
 #include "chrome/browser/extensions/extension_service.h"
-#include "chrome/browser/extensions/extension_system.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/common/chrome_constants.h"
 #include "chrome/common/chrome_switches.h"
 #include "content/public/browser/browser_thread.h"
+#include "extensions/browser/extension_system.h"
 #include "grit/browser_resources.h"
 
 #if defined(OS_CHROMEOS)
 #include "chrome/browser/chromeos/system/input_device_settings.h"
 #include "chromeos/chromeos_constants.h"
 #include "chromeos/chromeos_switches.h"
 #endif
 
 using content::BrowserThread;
 
@@ skipping 75 matching lines @@
 static base::LazyInstance<ProfileKeyedAPIFactory<GaiaAuthExtensionLoader> >
 g_factory = LAZY_INSTANCE_INITIALIZER;
 
 // static
 ProfileKeyedAPIFactory<GaiaAuthExtensionLoader>*
 GaiaAuthExtensionLoader::GetFactoryInstance() {
   return g_factory.Pointer();
 }
 
 } // namespace extensions