Database usage adjustment for .../history

chrome/browser/history/thumbnail_database.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_THUMBNAIL_DATABASE_H_
 #define CHROME_BROWSER_HISTORY_THUMBNAIL_DATABASE_H_
 #pragma once
 
 #include <vector>
 
@@ skipping 57 matching lines @@
 
   // Vacuums the database. This will cause sqlite to defragment and collect
   // unused space in the file. It can be VERY SLOW.
   void Vacuum();
 
   // Thumbnails ----------------------------------------------------------------
 
   // Sets the given data to be the thumbnail for the given URL,
   // overwriting any previous data. If the SkBitmap contains no pixel
   // data, the thumbnail will be deleted.
-  void SetPageThumbnail(const GURL& url,
+  bool SetPageThumbnail(const GURL& url,
                         URLID id,
                         const gfx::Image* thumbnail,
                         const ThumbnailScore& score,
                         base::Time time);
 
   // Retrieves thumbnail data for the given URL, returning true on success,
   // false if there is no such thumbnail or there was some other error.
   bool GetPageThumbnail(URLID id, std::vector<unsigned char>* data);
 
   // Delete the thumbnail with the provided id. Returns false on failure
@@ skipping 211 matching lines @@
   const HistoryPublisher* history_publisher_;
 
   // True if migration to TopSites has been done and the thumbnails
   // table should not be used.
   bool use_top_sites_;
 };
 
 }  // namespace history
 
 #endif  // CHROME_BROWSER_HISTORY_THUMBNAIL_DATABASE_H_