Update platform classes to use OVERRIDE / FINAL when needed

Source/platform/scroll/ScrollAnimatorNone.h

 /*
  * Copyright (c) 2011, Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 30 matching lines @@
 
 class IntPoint;
 class ActivePlatformGestureAnimation;
 struct ScrollAnimatorParameters;
 
 class PLATFORM_EXPORT ScrollAnimatorNone : public ScrollAnimator {
 public:
     explicit ScrollAnimatorNone(ScrollableArea*);
     virtual ~ScrollAnimatorNone();
 
-    virtual bool scroll(ScrollbarOrientation, ScrollGranularity, float step, float delta);
-    virtual void scrollToOffsetWithoutAnimation(const FloatPoint&);
+    virtual bool scroll(ScrollbarOrientation, ScrollGranularity, float step, float delta) OVERRIDE;
+    virtual void scrollToOffsetWithoutAnimation(const FloatPoint&) OVERRIDE;
 
-    virtual void cancelAnimations();
-    virtual void serviceScrollAnimations();
+    virtual void cancelAnimations() OVERRIDE;
+    virtual void serviceScrollAnimations() OVERRIDE;
 
-    virtual void willEndLiveResize();
-    virtual void didAddVerticalScrollbar(Scrollbar*);
-    virtual void didAddHorizontalScrollbar(Scrollbar*);
+    virtual void willEndLiveResize() OVERRIDE;
+    virtual void didAddVerticalScrollbar(Scrollbar*) OVERRIDE;
+    virtual void didAddHorizontalScrollbar(Scrollbar*) OVERRIDE;
 
     enum Curve {
         Linear,
         Quadratic,
         Cubic,
         Quartic,
         Bounce
     };
 
     struct PLATFORM_EXPORT Parameters {
@@ skipping 75 matching lines @@
     PerAxisData m_horizontalData;
     PerAxisData m_verticalData;
 
     double m_startTime;
     bool m_animationActive;
 };
 
 } // namespace WebCore
 
 #endif // ScrollAnimatorNone_h