Template methods on Timer classes instead of the classes themselves.

chrome/browser/metrics/variations/variations_registry_syncer_win.h

 // Copyright (c) 2013 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_METRICS_VARIATIONS_VARIATIONS_REGISTRY_SYNCER_WIN_H_
 #define CHROME_BROWSER_METRICS_VARIATIONS_VARIATIONS_REGISTRY_SYNCER_WIN_H_
 
 #include "base/timer/timer.h"
 
 namespace chrome_variations {
@@ skipping 13 matching lines @@
  private:
   // Starts the actual synchronization process with the registry. Posts a task
   // to do it on the blocking pool to avoid jank.
   void StartRegistrySync();
 
   // A timer used to delay the writes to the registry. This is done to optimize
   // the case where lazy-loaded features start their field trials some time
   // after initial batch of field trials are created, and also to avoid blocking
   // the UI thread. The timer effectively allows this class to batch together
   // update requests, to avoid reading and writing from the registry too much.
-  base::OneShotTimer<VariationsRegistrySyncer> timer_;
+  base::OneShotTimer timer_;
 
   DISALLOW_COPY_AND_ASSIGN(VariationsRegistrySyncer);
 };
 
 }  // namespace chrome_variations
 
 #endif  // CHROME_BROWSER_METRICS_VARIATIONS_VARIATIONS_REGISTRY_SYNCER_WIN_H_