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      1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef CHROME_BROWSER_THUMBNAILS_THUMBNAIL_SERVICE_FACTORY_H_
      6 #define CHROME_BROWSER_THUMBNAILS_THUMBNAIL_SERVICE_FACTORY_H_
      7 
      8 #include "base/memory/ref_counted.h"
      9 #include "base/memory/singleton.h"
     10 #include "components/browser_context_keyed_service/refcounted_browser_context_keyed_service_factory.h"
     11 
     12 class Profile;
     13 
     14 namespace thumbnails {
     15 class ThumbnailService;
     16 }
     17 
     18 class ThumbnailServiceFactory
     19     : public RefcountedBrowserContextKeyedServiceFactory {
     20  public:
     21   // Returns an instance of ThumbnailService associated with this profile
     22   // (creating one if none exists). Returns NULL if this profile cannot have a
     23   // ThumbnailService (for example, if |profile| is incognito).
     24   // Depending on the settings, the implementation of the service interface
     25   // can be provided either by TopSites (stored in the profile itself) or
     26   // be an instance of a real RefcountedBrowserContextKeyedService
     27   // implementation.
     28   static scoped_refptr<thumbnails::ThumbnailService> GetForProfile(
     29       Profile* profile);
     30 
     31   static ThumbnailServiceFactory* GetInstance();
     32 
     33  private:
     34   friend struct DefaultSingletonTraits<ThumbnailServiceFactory>;
     35 
     36   ThumbnailServiceFactory();
     37   virtual ~ThumbnailServiceFactory();
     38 
     39   // BrowserContextKeyedServiceFactory:
     40   virtual scoped_refptr<RefcountedBrowserContextKeyedService>
     41       BuildServiceInstanceFor(content::BrowserContext* profile) const OVERRIDE;
     42 
     43   DISALLOW_COPY_AND_ASSIGN(ThumbnailServiceFactory);
     44 };
     45 
     46 #endif  // CHROME_BROWSER_THUMBNAILS_THUMBNAIL_SERVICE_FACTORY_H_
     47