virtual/override specifier cleanup in content/.

content/browser/media/media_web_contents_observer.h

Index: content/browser/media/media_web_contents_observer.h
diff --git a/content/browser/media/media_web_contents_observer.h b/content/browser/media/media_web_contents_observer.h
index d79e1ce930e12747e494fcd9f82d4cf8dad4530b..d0b0eeccf0a9776288f64f637b56d489dd2a06d0 100644
--- a/content/browser/media/media_web_contents_observer.h
+++ b/content/browser/media/media_web_contents_observer.h
@@ -23,14 +23,14 @@ class RenderViewHost;
 class CONTENT_EXPORT MediaWebContentsObserver : public WebContentsObserver {
  public:
   explicit MediaWebContentsObserver(RenderViewHost* render_view_host);
-  virtual ~MediaWebContentsObserver();
+  ~MediaWebContentsObserver() override;
 
   // WebContentsObserver implementations.
-  virtual void RenderFrameDeleted(RenderFrameHost* render_frame_host) override;
+  void RenderFrameDeleted(RenderFrameHost* render_frame_host) override;
 
 #if defined(OS_ANDROID)
-  virtual bool OnMessageReceived(const IPC::Message& message,
-                                 RenderFrameHost* render_frame_host) override;
+  bool OnMessageReceived(const IPC::Message& message,
+                         RenderFrameHost* render_frame_host) override;
 
   // Helper functions to handle media player IPC messages. Returns whether the
   // |message| is handled in the function.