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

content/renderer/media/video_capture_message_filter.h

Index: content/renderer/media/video_capture_message_filter.h
diff --git a/content/renderer/media/video_capture_message_filter.h b/content/renderer/media/video_capture_message_filter.h
index a875a9545c7c983280962fc634f0b9c1d24b8a85..c55d17f59eab433e5c4e5560bc1852e6f5d47e3d 100644
--- a/content/renderer/media/video_capture_message_filter.h
+++ b/content/renderer/media/video_capture_message_filter.h
@@ -80,13 +80,13 @@ class CONTENT_EXPORT VideoCaptureMessageFilter : public IPC::MessageFilter {
   virtual bool Send(IPC::Message* message);
 
   // IPC::MessageFilter override. Called on IO thread.
-  virtual bool OnMessageReceived(const IPC::Message& message) override;
-  virtual void OnFilterAdded(IPC::Sender* sender) override;
-  virtual void OnFilterRemoved() override;
-  virtual void OnChannelClosing() override;
+  bool OnMessageReceived(const IPC::Message& message) override;
+  void OnFilterAdded(IPC::Sender* sender) override;
+  void OnFilterRemoved() override;
+  void OnChannelClosing() override;
 
  protected:
-  virtual ~VideoCaptureMessageFilter();
+  ~VideoCaptureMessageFilter() override;
 
  private:
   typedef std::map<int32, Delegate*> Delegates;