Move extensions-related files to using //components/keyed_service.

chrome/browser/extensions/api/system_info/system_info_api.h

 // 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.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_API_SYSTEM_INFO_SYSTEM_INFO_API_H_
 #define CHROME_BROWSER_EXTENSIONS_API_SYSTEM_INFO_SYSTEM_INFO_API_H_
 
 #include "extensions/browser/browser_context_keyed_api_factory.h"
 #include "extensions/browser/event_router.h"
 
 namespace extensions {
 
 // A Profile-scoped object which is registered as an observer of EventRouter
 // to observe the systemInfo event listener arrival/removal.
 class SystemInfoAPI : public BrowserContextKeyedAPI,
                       public EventRouter::Observer {
  public:
   // BrowserContextKeyedAPI implementation.
   static BrowserContextKeyedAPIFactory<SystemInfoAPI>* GetFactoryInstance();
 
   explicit SystemInfoAPI(content::BrowserContext* context);
   virtual ~SystemInfoAPI();
 
-  // BrowserContextKeyedService implementation.
+  // KeyedService implementation.
   virtual void Shutdown() OVERRIDE;
 
   // EventRouter::Observer implementation.
   virtual void OnListenerAdded(const EventListenerInfo& details) OVERRIDE;
   virtual void OnListenerRemoved(const EventListenerInfo& details) OVERRIDE;
 
  private:
   friend class BrowserContextKeyedAPIFactory<SystemInfoAPI>;
 
   // BrowserContextKeyedAPI implementation.
   static const char* service_name() {
     return "SystemInfoAPI";
   }
   static const bool kServiceIsNULLWhileTesting = true;
 
   content::BrowserContext* browser_context_;
 
   DISALLOW_COPY_AND_ASSIGN(SystemInfoAPI);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_SYSTEM_INFO_SYSTEM_INFO_API_H_