Standardize usage of virtual/override/final in chrome/browser/ui/

chrome/browser/ui/webui/media/webrtc_logs_ui.cc

Index: chrome/browser/ui/webui/media/webrtc_logs_ui.cc
diff --git a/chrome/browser/ui/webui/media/webrtc_logs_ui.cc b/chrome/browser/ui/webui/media/webrtc_logs_ui.cc
index 70b91a4450b67419eceae77db82e7b3a788a5f17..ea7307fe1a4acacf925636bb5ab9cfc0b4c91f22 100644
--- a/chrome/browser/ui/webui/media/webrtc_logs_ui.cc
+++ b/chrome/browser/ui/webui/media/webrtc_logs_ui.cc
@@ -78,13 +78,13 @@ class WebRtcLogsDOMHandler : public WebUIMessageHandler,
                              public UploadList::Delegate {
  public:
   explicit WebRtcLogsDOMHandler(Profile* profile);
-  virtual ~WebRtcLogsDOMHandler();
+  ~WebRtcLogsDOMHandler() override;
 
   // WebUIMessageHandler implementation.
-  virtual void RegisterMessages() override;
+  void RegisterMessages() override;
 
   // UploadList::Delegate implemenation.
-  virtual void OnUploadListAvailable() override;
+  void OnUploadListAvailable() override;
 
  private:
   // Asynchronously fetches the list of upload WebRTC logs. Called from JS.