Revert "Refactor code listening to platform events in content/renderer/."

content/renderer/device_sensors/device_motion_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_MOTION_EVENT_PUMP_H_
 #define CONTENT_RENDERER_DEVICE_SENSORS_DEVICE_MOTION_EVENT_PUMP_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "content/renderer/device_sensors/device_sensor_event_pump.h"
 #include "content/renderer/shared_memory_seqlock_reader.h"
 #include "third_party/WebKit/public/platform/WebDeviceMotionData.h"
 
 namespace blink {
 class WebDeviceMotionListener;
 }
 
 namespace content {
 
 typedef SharedMemorySeqLockReader<blink::WebDeviceMotionData>
     DeviceMotionSharedMemoryReader;
 
-class CONTENT_EXPORT DeviceMotionEventPump
-    : public DeviceSensorEventPump<blink::WebDeviceMotionListener> {
+class CONTENT_EXPORT DeviceMotionEventPump : public DeviceSensorEventPump {
  public:
-  explicit DeviceMotionEventPump(RenderThread* thread);
+  DeviceMotionEventPump();
+  explicit DeviceMotionEventPump(int pump_delay_millis);
   virtual ~DeviceMotionEventPump();
 
-  // // PlatformEventObserver.
+  // Sets the listener to receive updates for device motion data at
+  // regular intervals. Returns true if the registration was successful.
+  bool SetListener(blink::WebDeviceMotionListener* listener);
+
+  // RenderProcessObserver implementation.
   virtual bool OnControlMessageReceived(const IPC::Message& message) OVERRIDE;
-  virtual void SendFakeDataForTesting(void* fake_data) OVERRIDE;
 
  protected:
   virtual void FireEvent() OVERRIDE;
   virtual bool InitializeReader(base::SharedMemoryHandle handle) OVERRIDE;
+  virtual bool SendStartMessage() OVERRIDE;
+  virtual bool SendStopMessage() OVERRIDE;
 
-  // PlatformEventObserver.
-  virtual void SendStartMessage() OVERRIDE;
-  virtual void SendStopMessage() OVERRIDE;
-
+  blink::WebDeviceMotionListener* listener_;
   scoped_ptr<DeviceMotionSharedMemoryReader> reader_;
-
-  DISALLOW_COPY_AND_ASSIGN(DeviceMotionEventPump);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_DEVICE_SENSORS_DEVICE_MOTION_EVENT_PUMP_H_