Ensure using chrome://thumb2/... adds the URL as a forced URL in TopSites so that a thumbnail is ca…

chrome/browser/thumbnails/thumbnail_service_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.
 
 #ifndef CHROME_BROWSER_THUMBNAILS_THUMBNAIL_SERVICE_IMPL_H_
 #define CHROME_BROWSER_THUMBNAILS_THUMBNAIL_SERVICE_IMPL_H_
 
 #include "base/memory/ref_counted.h"
 #include "chrome/browser/history/top_sites.h"
 #include "chrome/browser/profiles/profile.h"
@@ skipping 12 matching lines @@
   explicit ThumbnailServiceImpl(Profile* profile);
 
   // Implementation of ThumbnailService.
   virtual bool SetPageThumbnail(const ThumbnailingContext& context,
                                 const gfx::Image& thumbnail) OVERRIDE;
   virtual ThumbnailingAlgorithm* GetThumbnailingAlgorithm() const OVERRIDE;
   virtual bool GetPageThumbnail(
       const GURL& url,
       bool prefix_match,
       scoped_refptr<base::RefCountedMemory>* bytes) OVERRIDE;
+  virtual void AddForcedURL(const GURL& url) OVERRIDE;
   virtual bool ShouldAcquirePageThumbnail(const GURL& url) OVERRIDE;
 
   // Implementation of RefcountedBrowserContextKeyedService.
   virtual void ShutdownOnUIThread() OVERRIDE;
 
  private:
   virtual ~ThumbnailServiceImpl();
 
   scoped_refptr<history::TopSites> top_sites_;
   bool use_thumbnail_retargeting_;
 
   DISALLOW_COPY_AND_ASSIGN(ThumbnailServiceImpl);
 };
 
 }  // namespace thumbnails
 
 #endif  // CHROME_BROWSER_THUMBNAILS_THUMBNAIL_SERVICE_IMPL_H_