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

chrome/browser/thumbnails/thumbnail_service.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_H_
 #define CHROME_BROWSER_THUMBNAILS_THUMBNAIL_SERVICE_H_
 
 #include "chrome/common/thumbnail_score.h"
 #include "components/browser_context_keyed_service/refcounted_browser_context_keyed_service.h"
 #include "ui/gfx/image/image.h"
@@ skipping 32 matching lines @@
   // If an exact thumbnail URL match fails, |prefix_match| specifies whether or
   // not to try harder by matching the query thumbnail URL as URL prefix (as
   // defined by UrlIsPrefix()).
   // As this method may be invoked on any thread the ref count needs to be
   // incremented before this method returns, so this takes a scoped_refptr*.
   virtual bool GetPageThumbnail(
       const GURL& url,
       bool prefix_match,
       scoped_refptr<base::RefCountedMemory>* bytes) = 0;
 
+  // Add or updates a |url| for which we should force the capture of a thumbnail
+  // next time it's visited.
+  virtual void AddForcedURL(const GURL& url) = 0;
+
   // Returns true if the page thumbnail should be updated.
   virtual bool ShouldAcquirePageThumbnail(const GURL& url) = 0;
 
  protected:
   virtual ~ThumbnailService() {}
 };
 
 }  // namespace thumbnails
 
 #endif  // CHROME_BROWSER_THUMBNAILS_THUMBNAIL_SERVICE_H_