Add TopSites::GetTemporaryThumbnailScore().

chrome/browser/history/top_sites.h

 // Copyright (c) 2011 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_HISTORY_TOP_SITES_H_
 #define CHROME_BROWSER_HISTORY_TOP_SITES_H_
 #pragma once
 
 #include <list>
 #include <set>
@@ skipping 66 matching lines @@
   // As this method may be invoked on any thread the ref count needs to be
   // upped before this method returns, so this takes a scoped_refptr*.
   bool GetPageThumbnail(const GURL& url,
                         scoped_refptr<RefCountedBytes>* bytes);
 
   // Get a thumbnail score for a given page. Returns true iff we have the
   // thumbnail score.  This may be invoked on any thread. The score will
   // be copied to |score|.
   virtual bool GetPageThumbnailScore(const GURL& url, ThumbnailScore* score);
 
+  // Get a temporary thumbnail score for a given page. Returns true iff we
+  // have the thumbnail score. Useful when checking if we should update a
+  // thumbnail for a given page. The score will be copied to |score|.
+  bool GetTemporaryPageThumbnailScore(const GURL& url, ThumbnailScore* score);
+
   // Invoked from History if migration is needed. If this is invoked it will
   // be before HistoryLoaded is invoked.
   void MigrateFromHistory();
 
   // Invoked with data from migrating thumbnails out of history.
   void FinishHistoryMigration(const ThumbnailMigration& data);
 
   // Invoked from history when it finishes loading. If MigrateFromHistory was
   // not invoked at this point then we load from the top sites service.
   void HistoryLoaded();
@@ skipping 265 matching lines @@
 
   // Are we loaded?
   bool loaded_;
 
   DISALLOW_COPY_AND_ASSIGN(TopSites);
 };
 
 }  // namespace history
 
 #endif  // CHROME_BROWSER_HISTORY_TOP_SITES_H_