Template methods on Timer classes instead of the classes themselves.

chrome/browser/chromeos/customization/customization_wallpaper_downloader.h

 // Copyright 2014 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_CHROMEOS_CUSTOMIZATION_CUSTOMIZATION_WALLPAPER_DOWNLOADER_H_
 #define CHROME_BROWSER_CHROMEOS_CUSTOMIZATION_CUSTOMIZATION_WALLPAPER_DOWNLOADER_H_
 
 #include <string>
 
 #include "base/bind.h"
@@ skipping 75 matching lines @@
   // Wallpaper directory (to be created).
   const base::FilePath wallpaper_dir_;
 
   // Full path to local file to save downloaded wallpaper.
   const base::FilePath wallpaper_downloaded_file_;
 
   // Full path to temporary file to fetch downloaded wallpper.
   const base::FilePath wallpaper_temporary_file_;
 
   // Pending retry.
-  base::OneShotTimer<CustomizationWallpaperDownloader> request_scheduled_;
+  base::OneShotTimer request_scheduled_;
 
   // Number of download retries (first attempt is not counted as retry).
   size_t retries_;
 
   // Sleep between retry requests (increasing, see Retry() method for details).
   // Non-constant value for tests.
   base::TimeDelta retry_delay_;
 
   // Retry delay of the last attempt. For testing only.
   base::TimeDelta retry_current_delay_;
 
   // Callback supplied by caller.
   base::Callback<void(bool success, const GURL&)> on_wallpaper_fetch_completed_;
 
   base::WeakPtrFactory<CustomizationWallpaperDownloader> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(CustomizationWallpaperDownloader);
 };
 
 }  //   namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_CUSTOMIZATION_CUSTOMIZATION_WALLPAPER_DOWNLOADER_H_