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

chrome/browser/ui/cocoa/tabs/media_indicator_view.mm

Index: chrome/browser/ui/cocoa/tabs/media_indicator_view.mm
diff --git a/chrome/browser/ui/cocoa/tabs/media_indicator_view.mm b/chrome/browser/ui/cocoa/tabs/media_indicator_view.mm
index 2711a7921777ef8c6d4a6454699c127b4f8f3d0c..e3e71cdbcb1d09675e34b21602bb938ffe22a097 100644
--- a/chrome/browser/ui/cocoa/tabs/media_indicator_view.mm
+++ b/chrome/browser/ui/cocoa/tabs/media_indicator_view.mm
@@ -16,22 +16,22 @@ class MediaIndicatorViewAnimationDelegate : public gfx::AnimationDelegate {
       : view_(view), mediaState_(mediaState),
         animatingMediaState_(animatingMediaState),
         doneCallbackObject_(nil), doneCallbackSelector_(nil) {}
-  virtual ~MediaIndicatorViewAnimationDelegate() {}
+  ~MediaIndicatorViewAnimationDelegate() override {}
 
   void SetAnimationDoneCallback(id anObject, SEL selector) {
     doneCallbackObject_ = anObject;
     doneCallbackSelector_ = selector;
   }
 
-  virtual void AnimationEnded(const gfx::Animation* animation) override {
+  void AnimationEnded(const gfx::Animation* animation) override {
     *animatingMediaState_ = *mediaState_;
     [view_ setNeedsDisplay:YES];
     [doneCallbackObject_ performSelector:doneCallbackSelector_];
   }
-  virtual void AnimationProgressed(const gfx::Animation* animation) override {
+  void AnimationProgressed(const gfx::Animation* animation) override {
     [view_ setNeedsDisplay:YES];
   }
-  virtual void AnimationCanceled(const gfx::Animation* animation) override {
+  void AnimationCanceled(const gfx::Animation* animation) override {
     AnimationEnded(animation);
   }