Update {virtual,override} to follow C++11 style in content.

content/renderer/media/webrtc_audio_capturer_unittest.cc

 // Copyright 2013 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 "base/logging.h"
 #include "content/public/renderer/media_stream_audio_sink.h"
 #include "content/renderer/media/mock_media_constraint_factory.h"
 #include "content/renderer/media/webrtc/webrtc_local_audio_track_adapter.h"
 #include "content/renderer/media/webrtc_audio_capturer.h"
 #include "content/renderer/media/webrtc_local_audio_track.h"
@@ skipping 15 matching lines @@
   MockCapturerSource() {}
   MOCK_METHOD3(Initialize, void(const media::AudioParameters& params,
                                 CaptureCallback* callback,
                                 int session_id));
   MOCK_METHOD0(Start, void());
   MOCK_METHOD0(Stop, void());
   MOCK_METHOD1(SetVolume, void(double volume));
   MOCK_METHOD1(SetAutomaticGainControl, void(bool enable));
 
  protected:
-  virtual ~MockCapturerSource() {}
+  ~MockCapturerSource() override {}
 };
 
 class MockMediaStreamAudioSink : public MediaStreamAudioSink {
  public:
   MockMediaStreamAudioSink() {}
-  ~MockMediaStreamAudioSink() {}
-  virtual void OnData(const media::AudioBus& audio_bus,
-                      base::TimeTicks estimated_capture_time) override {
+  ~MockMediaStreamAudioSink() override {}
+  void OnData(const media::AudioBus& audio_bus,
+              base::TimeTicks estimated_capture_time) override {
     EXPECT_EQ(audio_bus.channels(), params_.channels());
     EXPECT_EQ(audio_bus.frames(), params_.frames_per_buffer());
     EXPECT_FALSE(estimated_capture_time.is_null());
     OnDataCallback();
   }
   MOCK_METHOD0(OnDataCallback, void());
-  virtual void OnSetFormat(const media::AudioParameters& params) override {
+  void OnSetFormat(const media::AudioParameters& params) override {
     params_ = params;
     FormatIsSet();
   }
   MOCK_METHOD0(FormatIsSet, void());
 
  private:
   media::AudioParameters params_;
 };
 
 }  // namespace
@@ skipping 77 matching lines @@
       WebRtcAudioCapturer::CreateCapturer(
           0, StreamDeviceInfo(MEDIA_DEVICE_AUDIO_CAPTURE, "", "",
                               params_.sample_rate(), params_.channel_layout(),
                               params_.frames_per_buffer()),
           constraint_factory.CreateWebMediaConstraints(), NULL, NULL));
   EXPECT_TRUE(capturer.get() == NULL);
 }
 
 
 }  // namespace content