Standardize usage of virtual/override/final in content/renderer/

content/renderer/device_sensors/device_orientation_event_pump_unittest.cc

Index: content/renderer/device_sensors/device_orientation_event_pump_unittest.cc
diff --git a/content/renderer/device_sensors/device_orientation_event_pump_unittest.cc b/content/renderer/device_sensors/device_orientation_event_pump_unittest.cc
index f95850182dd6020984367588e38a5d51913c1be9..f21071bccd4c0caaf7b2c0d82661c41919c1c659 100644
--- a/content/renderer/device_sensors/device_orientation_event_pump_unittest.cc
+++ b/content/renderer/device_sensors/device_orientation_event_pump_unittest.cc
@@ -48,14 +48,14 @@ class DeviceOrientationEventPumpForTesting : public DeviceOrientationEventPump {
  public:
   DeviceOrientationEventPumpForTesting()
       : DeviceOrientationEventPump(0) { }
-  virtual ~DeviceOrientationEventPumpForTesting() { }
+  ~DeviceOrientationEventPumpForTesting() override {}
 
   void OnDidStart(base::SharedMemoryHandle renderer_handle) {
     DeviceOrientationEventPump::OnDidStart(renderer_handle);
   }
-  virtual void SendStartMessage() override { }
-  virtual void SendStopMessage() override { }
-  virtual void FireEvent() override {
+  void SendStartMessage() override {}
+  void SendStopMessage() override {}
+  void FireEvent() override {
     DeviceOrientationEventPump::FireEvent();
     Stop();
     base::MessageLoop::current()->QuitWhenIdle();