Standardize usage of virtual/override/final in media/

media/cast/test/fake_receiver_time_offset_estimator.h

Index: media/cast/test/fake_receiver_time_offset_estimator.h
diff --git a/media/cast/test/fake_receiver_time_offset_estimator.h b/media/cast/test/fake_receiver_time_offset_estimator.h
index 2b78c06783077149d388002f09151e94709938be..fc3a901b92c49fbcf28688e34885e2afbd42ad26 100644
--- a/media/cast/test/fake_receiver_time_offset_estimator.h
+++ b/media/cast/test/fake_receiver_time_offset_estimator.h
@@ -20,15 +20,15 @@ class FakeReceiverTimeOffsetEstimator : public ReceiverTimeOffsetEstimator {
  public:
   FakeReceiverTimeOffsetEstimator(base::TimeDelta offset);
 
-  virtual ~FakeReceiverTimeOffsetEstimator();
+  ~FakeReceiverTimeOffsetEstimator() override;
 
   // RawReventSubscriber implementations.
-  virtual void OnReceiveFrameEvent(const FrameEvent& frame_event) override;
-  virtual void OnReceivePacketEvent(const PacketEvent& packet_event) override;
+  void OnReceiveFrameEvent(const FrameEvent& frame_event) override;
+  void OnReceivePacketEvent(const PacketEvent& packet_event) override;
 
   // ReceiverTimeOffsetEstimator
-  virtual bool GetReceiverOffsetBounds(base::TimeDelta* lower_bound,
-                                       base::TimeDelta* upper_bound) override;
+  bool GetReceiverOffsetBounds(base::TimeDelta* lower_bound,
+                               base::TimeDelta* upper_bound) override;
 
  private:
   const base::TimeDelta offset_;