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

content/browser/media/capture/web_contents_audio_input_stream.cc

 // Copyright (c) 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 "content/browser/media/capture/web_contents_audio_input_stream.h"
 
 #include <string>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 46 matching lines @@
 
   typedef AudioMirroringManager::SourceFrameRef SourceFrameRef;
 
   enum State {
     CONSTRUCTED,
     OPENED,
     MIRRORING,
     CLOSED
   };
 
-  virtual ~Impl();
+  ~Impl() override;
 
   // Notifies the consumer callback that the stream is now dead.
   void ReportError();
 
   // (Re-)Start/Stop mirroring by posting a call to AudioMirroringManager on the
   // IO BrowserThread.
   void StartMirroring();
   void StopMirroring();
 
   // Invoked on the UI thread to make sure WebContents muting is turned off for
   // successful audio capture.
   void UnmuteWebContentsAudio();
 
   // AudioMirroringManager::MirroringDestination implementation
-  virtual void QueryForMatches(
-      const std::set<SourceFrameRef>& candidates,
-      const MatchesCallback& results_callback) override;
+  void QueryForMatches(const std::set<SourceFrameRef>& candidates,
+                       const MatchesCallback& results_callback) override;
   void QueryForMatchesOnUIThread(const std::set<SourceFrameRef>& candidates,
                                  const MatchesCallback& results_callback);
-  virtual media::AudioOutputStream* AddInput(
+  media::AudioOutputStream* AddInput(
       const media::AudioParameters& params) override;
 
   // Callback which is run when |stream| is closed.  Deletes |stream|.
   void ReleaseInput(media::VirtualAudioOutputStream* stream);
 
   // Called by WebContentsTracker when the target of the audio mirroring has
   // changed.
   void OnTargetChanged(RenderWidgetHost* target);
 
   // Injected dependencies.
@@ skipping 291 matching lines @@
 
 bool WebContentsAudioInputStream::GetAutomaticGainControl() {
   return impl_->mixer_stream()->GetAutomaticGainControl();
 }
 
 bool WebContentsAudioInputStream::IsMuted() {
   return false;
 }
 
 }  // namespace content