Standardize usage of virtual/override/final 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<blink::WebDeviceOrientationListener> {
  public:
   // Angle threshold beyond which two orientation events are considered
   // sufficiently different.
   static const double kOrientationThreshold;
 
   explicit DeviceOrientationEventPump(RenderThread* thread);
-  virtual ~DeviceOrientationEventPump();
+  ~DeviceOrientationEventPump() override;
 
   // PlatformEventObserver.
-  virtual bool OnControlMessageReceived(const IPC::Message& message) override;
-  virtual void SendFakeDataForTesting(void* data) override;
+  bool OnControlMessageReceived(const IPC::Message& message) override;
+  void SendFakeDataForTesting(void* data) override;
 
  protected:
-  virtual void FireEvent() override;
-  virtual bool InitializeReader(base::SharedMemoryHandle handle) override;
+  void FireEvent() override;
+  bool InitializeReader(base::SharedMemoryHandle handle) override;
 
   // PlatformEventObserver.
-  virtual void SendStartMessage() override;
-  virtual void SendStopMessage() override;
+  void SendStartMessage() override;
+  void SendStopMessage() override;
 
   bool ShouldFireEvent(const blink::WebDeviceOrientationData& data) const;
 
   blink::WebDeviceOrientationData data_;
   scoped_ptr<DeviceOrientationSharedMemoryReader> reader_;
 
   DISALLOW_COPY_AND_ASSIGN(DeviceOrientationEventPump);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_DEVICE_SENSORS_DEVICE_ORIENTATION_EVENT_PUMP_H_