Fix virtual/override/final usage in Source/platform/.

Source/platform/exported/WebScrollbarThemeGeometryNative.h

 /*
  * Copyright (C) 2012 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:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 23 matching lines @@
 namespace blink {
 
 class ScrollbarTheme;
 class WebScrollbar;
 
 class PLATFORM_EXPORT WebScrollbarThemeGeometryNative : public WebScrollbarThemeGeometry {
 public:
     static PassOwnPtr<WebScrollbarThemeGeometryNative> create(ScrollbarTheme*);
 
     // WebScrollbarThemeGeometry overrides
-    virtual WebScrollbarThemeGeometryNative* clone() const override;
-    virtual int thumbPosition(WebScrollbar*) override;
-    virtual int thumbLength(WebScrollbar*) override;
-    virtual int trackPosition(WebScrollbar*) override;
-    virtual int trackLength(WebScrollbar*) override;
-    virtual bool hasButtons(WebScrollbar*) override;
-    virtual bool hasThumb(WebScrollbar*) override;
-    virtual WebRect trackRect(WebScrollbar*) override;
-    virtual WebRect thumbRect(WebScrollbar*) override;
-    virtual int minimumThumbLength(WebScrollbar*) override;
-    virtual int scrollbarThickness(WebScrollbar*) override;
-    virtual WebRect backButtonStartRect(WebScrollbar*) override;
-    virtual WebRect backButtonEndRect(WebScrollbar*) override;
-    virtual WebRect forwardButtonStartRect(WebScrollbar*) override;
-    virtual WebRect forwardButtonEndRect(WebScrollbar*) override;
-    virtual WebRect constrainTrackRectToTrackPieces(WebScrollbar*, const WebRect&) override;
-    virtual void splitTrack(WebScrollbar*, const WebRect& track, WebRect& startTrack, WebRect& thumb, WebRect& endTrack) override;
+    WebScrollbarThemeGeometryNative* clone() const override;
+    int thumbPosition(WebScrollbar*) override;
+    int thumbLength(WebScrollbar*) override;
+    int trackPosition(WebScrollbar*) override;
+    int trackLength(WebScrollbar*) override;
+    bool hasButtons(WebScrollbar*) override;
+    bool hasThumb(WebScrollbar*) override;
+    WebRect trackRect(WebScrollbar*) override;
+    WebRect thumbRect(WebScrollbar*) override;
+    int minimumThumbLength(WebScrollbar*) override;
+    int scrollbarThickness(WebScrollbar*) override;
+    WebRect backButtonStartRect(WebScrollbar*) override;
+    WebRect backButtonEndRect(WebScrollbar*) override;
+    WebRect forwardButtonStartRect(WebScrollbar*) override;
+    WebRect forwardButtonEndRect(WebScrollbar*) override;
+    WebRect constrainTrackRectToTrackPieces(WebScrollbar*, const WebRect&) override;
+    void splitTrack(WebScrollbar*, const WebRect& track, WebRect& startTrack, WebRect& thumb, WebRect& endTrack) override;
 
 private:
     explicit WebScrollbarThemeGeometryNative(ScrollbarTheme*);
 
     // The theme is not owned by this class. It is assumed that the theme is a
     // static pointer and its lifetime is essentially infinite. Only thread-safe
     // functions on the theme can be called by this theme.
     ScrollbarTheme* m_theme;
 };
 
 } // namespace blink
 
 #endif