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

content/renderer/media/android/renderer_media_player_manager.h

Index: content/renderer/media/android/renderer_media_player_manager.h
diff --git a/content/renderer/media/android/renderer_media_player_manager.h b/content/renderer/media/android/renderer_media_player_manager.h
index 4a518295cb25e450e0d3fc6dea6df7e9711ea6ae..aec4910be5385dd5785d7ac686f992b8a5028abb 100644
--- a/content/renderer/media/android/renderer_media_player_manager.h
+++ b/content/renderer/media/android/renderer_media_player_manager.h
@@ -34,11 +34,11 @@ class RendererMediaPlayerManager : public RenderFrameObserver {
  public:
   // Constructs a RendererMediaPlayerManager object for the |render_frame|.
   explicit RendererMediaPlayerManager(RenderFrame* render_frame);
-  virtual ~RendererMediaPlayerManager();
+  ~RendererMediaPlayerManager() override;
 
   // RenderFrameObserver overrides.
-  virtual bool OnMessageReceived(const IPC::Message& msg) override;
-  virtual void WasHidden() override;
+  bool OnMessageReceived(const IPC::Message& msg) override;
+  void WasHidden() override;
 
   // Initializes a MediaPlayerAndroid object in browser process.
   void Initialize(MediaPlayerHostMsg_Initialize_Type type,
@@ -96,7 +96,7 @@ class RendererMediaPlayerManager : public RenderFrameObserver {
   void RequestExternalSurface(int player_id, const gfx::RectF& geometry);
 
   // RenderFrameObserver overrides.
-  virtual void DidCommitCompositorFrame() override;
+  void DidCommitCompositorFrame() override;
 
   // Returns true if a media player should use video-overlay for the embedded
   // encrypted video.