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

content/renderer/device_sensors/device_orientation_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_ORIENTATION_EVENT_PUMP_H_
 #define CONTENT_RENDERER_DEVICE_SENSORS_DEVICE_ORIENTATION_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/WebDeviceOrientationData.h"
 
 namespace blink {
 class WebDeviceOrientationListener;
 }
 
 namespace content {
 
 typedef SharedMemorySeqLockReader<blink::WebDeviceOrientationData>
     DeviceOrientationSharedMemoryReader;
 
-class CONTENT_EXPORT DeviceOrientationEventPump : public DeviceSensorEventPump {
+class CONTENT_EXPORT DeviceOrientationEventPump
+    : public DeviceSensorEventPump<blink::WebDeviceOrientationListener> {
  public:
   // Angle threshold beyond which two orientation events are considered
   // sufficiently different.
   static const double kOrientationThreshold;
 
-  DeviceOrientationEventPump();
-  explicit DeviceOrientationEventPump(int pump_delay_millis);
+  explicit DeviceOrientationEventPump(RenderThread* thread);
   virtual ~DeviceOrientationEventPump();
 
-  // Sets the listener to receive updates for device orientation data at
-  // regular intervals. Returns true if the registration was successful.
-  bool SetListener(blink::WebDeviceOrientationListener* listener);
-
-  // RenderProcessObserver implementation.
+  // PlatformEventObserver.
   virtual bool OnControlMessageReceived(const IPC::Message& message) OVERRIDE;
+  virtual void SendFakeDataForTesting(void* 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;
 
   bool ShouldFireEvent(const blink::WebDeviceOrientationData& data) const;
 
-  blink::WebDeviceOrientationListener* listener_;
   blink::WebDeviceOrientationData data_;
   scoped_ptr<DeviceOrientationSharedMemoryReader> reader_;
+
+  DISALLOW_COPY_AND_ASSIGN(DeviceOrientationEventPump);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_DEVICE_SENSORS_DEVICE_ORIENTATION_EVENT_PUMP_H_