Template methods on Timer classes instead of the classes themselves.

components/update_client/background_downloader_win.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 COMPONENTS_UPDATE_CLIENT_BACKGROUND_DOWNLOADER_WIN_H_
 #define COMPONENTS_UPDATE_CLIENT_BACKGROUND_DOWNLOADER_WIN_H_
 
 #include <windows.h>
 #include <bits.h>
 
@@ skipping 75 matching lines @@
   // Used to post responses back to the main thread. Initialized on the main
   // loop but accessed from the task runner.
   scoped_refptr<base::SingleThreadTaskRunner> main_task_runner_;
 
   net::URLRequestContextGetter* context_getter_;
   scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
 
   // The timer and the BITS interface pointers have thread affinity. These
   // members are initialized on the task runner and they must be destroyed
   // on the task runner.
-  scoped_ptr<base::RepeatingTimer<BackgroundDownloader>> timer_;
+  scoped_ptr<base::RepeatingTimer> timer_;
 
   base::win::ScopedComPtr<IBackgroundCopyManager> bits_manager_;
   base::win::ScopedComPtr<IBackgroundCopyJob> job_;
 
   // Contains the time when the download of the current url has started.
   base::Time download_start_time_;
 
   // Contains the time when the BITS job is last seen making progress.
   base::Time job_stuck_begin_time_;
 
   // True if EndDownload was called.
   bool is_completed_;
 
   // Contains the path of the downloaded file if the download was successful.
   base::FilePath response_;
 
   DISALLOW_COPY_AND_ASSIGN(BackgroundDownloader);
 };
 
 }  // namespace update_client
 
 #endif  // COMPONENTS_UPDATE_CLIENT_BACKGROUND_DOWNLOADER_WIN_H_