Add OVERRIDE to ui/.

ui/base/animation/throb_animation.h

Index: ui/base/animation/throb_animation.h
diff --git a/ui/base/animation/throb_animation.h b/ui/base/animation/throb_animation.h
index ff6faa093973b442a270ff79b5b6a736ed2c3171..46aae2ffb2ce36843e023022c0e143fad2e589a8 100644
--- a/ui/base/animation/throb_animation.h
+++ b/ui/base/animation/throb_animation.h
@@ -30,12 +30,12 @@ class UI_EXPORT ThrobAnimation : public SlideAnimation {
   void SetThrobDuration(int duration) { throb_duration_ = duration; }
 
   // Overridden to reset to the slide duration.
-  virtual void Reset();
-  virtual void Show();
-  virtual void Hide();
+  virtual void Reset() OVERRIDE;
+  virtual void Show() OVERRIDE;
+  virtual void Hide() OVERRIDE;
 
   // Overridden to maintain the slide duration.
-  virtual void SetSlideDuration(int duration);
+  virtual void SetSlideDuration(int duration) OVERRIDE;
 
   // The number of cycles remaining until the animation stops.
   void set_cycles_remaining(int value) { cycles_remaining_ = value; }
@@ -43,7 +43,7 @@ class UI_EXPORT ThrobAnimation : public SlideAnimation {
 
  protected:
   // Overriden to continually throb (assuming we're throbbing).
-  virtual void Step(base::TimeTicks time_now);
+  virtual void Step(base::TimeTicks time_now) OVERRIDE;
 
  private:
   // Resets state such that we behave like SlideAnimation.