Standardize usage of virtual/override/final specifiers.

content/renderer/media/webrtc/media_stream_track_metrics_unittest.cc

 // 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.
 
 #include "content/renderer/media/webrtc/media_stream_track_metrics.h"
 #include "content/renderer/media/webrtc/mock_peer_connection_dependency_factory.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/libjingle/source/talk/app/webrtc/mediastreaminterface.h"
 
@@ skipping 60 matching lines @@
   virtual ~MockMediaStreamTrackMetrics() {}
 
   MOCK_METHOD4(SendLifetimeMessage,
                void(const std::string&, TrackType, LifetimeEvent, StreamType));
 
   using MediaStreamTrackMetrics::MakeUniqueIdImpl;
 };
 
 class MediaStreamTrackMetricsTest : public testing::Test {
  public:
-  virtual void SetUp() override {
+  void SetUp() override {
     metrics_.reset(new MockMediaStreamTrackMetrics());
     stream_ = new rtc::RefCountedObject<MockMediaStream>("stream");
   }
 
-  virtual void TearDown() override {
+  void TearDown() override {
     metrics_.reset();
     stream_ = NULL;
   }
 
   scoped_refptr<MockAudioTrackInterface> MakeAudioTrack(std::string id) {
     return new rtc::RefCountedObject<MockAudioTrackInterface>(id);
   }
 
   scoped_refptr<MockVideoTrackInterface> MakeVideoTrack(std::string id) {
     return new rtc::RefCountedObject<MockVideoTrackInterface>(id);
@@ skipping 437 matching lines @@
                                   MediaStreamTrackMetrics::SENT_STREAM));
   EXPECT_CALL(*metrics_,
               SendLifetimeMessage("video3",
                                   MediaStreamTrackMetrics::VIDEO_TRACK,
                                   MediaStreamTrackMetrics::DISCONNECTED,
                                   MediaStreamTrackMetrics::SENT_STREAM));
   metrics_->RemoveStream(MediaStreamTrackMetrics::SENT_STREAM, stream_.get());
 }
 
 }  // namespace content