Add OVERRIDE to ui/.

ui/base/animation/animation.h

Index: ui/base/animation/animation.h
diff --git a/ui/base/animation/animation.h b/ui/base/animation/animation.h
index 3b8288d8ec70505f8a1ebf0c68b9493291d2d7c2..257e99b438930bc1a3695c14bcf9f1fb4ba1ce28 100644
--- a/ui/base/animation/animation.h
+++ b/ui/base/animation/animation.h
@@ -6,6 +6,7 @@
 #define UI_BASE_ANIMATION_ANIMATION_H_
 #pragma once
 
+#include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
 #include "base/time.h"
 #include "ui/base/animation/animation_container_element.h"
@@ -81,9 +82,9 @@ class UI_EXPORT Animation : public AnimationContainerElement {
   AnimationDelegate* delegate() { return delegate_; }
 
   // AnimationContainer::Element overrides
-  virtual void SetStartTime(base::TimeTicks start_time);
+  virtual void SetStartTime(base::TimeTicks start_time) OVERRIDE;
   virtual void Step(base::TimeTicks time_now) = 0;
-  virtual base::TimeDelta GetTimerInterval() const;
+  virtual base::TimeDelta GetTimerInterval() const OVERRIDE;
 
  private:
   // Interval for the animation.