Move ExtensionPrefs and friends to extensions/ directory.

apps/app_load_service_factory.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 "apps/app_load_service_factory.h"
 
 #include "apps/app_load_service.h"
 #include "apps/shell_window_registry.h"
-#include "chrome/browser/extensions/extension_prefs_factory.h"
 #include "chrome/browser/extensions/extension_system_factory.h"
 #include "chrome/browser/profiles/profile.h"
 #include "components/browser_context_keyed_service/browser_context_dependency_manager.h"
+#include "extensions/browser/extension_prefs_factory.h"
 #include "extensions/browser/extensions_browser_client.h"
 
 namespace apps {
 
 // static
 AppLoadService* AppLoadServiceFactory::GetForProfile(Profile* profile) {
   return static_cast<AppLoadService*>(
       GetInstance()->GetServiceForBrowserContext(profile, true));
 }
 
@@ skipping 27 matching lines @@
 }
 
 content::BrowserContext* AppLoadServiceFactory::GetBrowserContextToUse(
     content::BrowserContext* context) const {
   // Redirected in incognito.
   return extensions::ExtensionsBrowserClient::Get()->
       GetOriginalContext(context);
 }
 
 }  // namespace apps