Remove ScrollbarThemeClient repaint methods.

third_party/WebKit/Source/platform/exported/WebScrollbarThemeClientImpl.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 61 matching lines @@
     ScrollbarPart hoveredPart() const override;
     void styleChanged() override;
     void visibilityChanged() override;
     bool enabled() const override;
     void setEnabled(bool) override;
     bool isOverlayScrollbar() const override;
     bool isAlphaLocked() const override;
     void setIsAlphaLocked(bool) override;
     float elasticOverscroll() const override;
     void setElasticOverscroll(float) override;
-    bool trackNeedsRepaint() const override;
-    void setTrackNeedsRepaint(bool) override;
-    bool thumbNeedsRepaint() const override;
-    void setThumbNeedsRepaint(bool) override;
 
     // DisplayItemClient methods.
     String debugName() const final;
     // TODO(chrishtr): fix this.
     IntRect visualRect() const override { return IntRect(); }
 
 private:
     WebScrollbar& m_scrollbar;
 };
 
 } // namespace blink
 
 #endif // WebScrollbarThemeClientImpl_h