Template methods on Timer classes instead of the classes themselves.

content/renderer/device_sensors/device_sensor_event_pump.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 CONTENT_RENDERER_DEVICE_SENSORS_DEVICE_SENSOR_EVENT_PUMP_H_
 #define CONTENT_RENDERER_DEVICE_SENSORS_DEVICE_SENSOR_EVENT_PUMP_H_
 
 #include "base/memory/shared_memory.h"
 #include "base/time/time.h"
 #include "base/timer/timer.h"
@@ skipping 74 matching lines @@
                    &DeviceSensorEventPump::FireEvent);
       state_ = RUNNING;
     }
   }
 
   virtual void FireEvent() = 0;
   virtual bool InitializeReader(base::SharedMemoryHandle handle) = 0;
 
   int pump_delay_microseconds_;
   PumpState state_;
-  base::RepeatingTimer<DeviceSensorEventPump> timer_;
+  base::RepeatingTimer timer_;
 
   DISALLOW_COPY_AND_ASSIGN(DeviceSensorEventPump);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_DEVICE_SENSORS_DEVICE_SENSOR_EVENT_PUMP_H_