Aura overlay scrollbars adjust color for dark backgrounds

third_party/WebKit/Source/platform/scroll/ScrollbarThemeClient.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 37 matching lines @@
 
   virtual Widget* parent() const = 0;
   virtual Widget* root() const = 0;
 
   virtual void setFrameRect(const IntRect&) = 0;
   virtual IntRect frameRect() const = 0;
 
   virtual void invalidate() = 0;
   virtual void invalidateRect(const IntRect&) = 0;
 
-  virtual ScrollbarOverlayStyle getScrollbarOverlayStyle() const = 0;
+  virtual ScrollbarOverlayColorTheme getScrollbarOverlayColorTheme() const = 0;
   virtual void getTickmarks(Vector<IntRect>&) const = 0;
   virtual bool isScrollableAreaActive() const = 0;
 
   virtual IntPoint convertFromRootFrame(
       const IntPoint& pointInRootFrame) const = 0;
 
   virtual bool isCustomScrollbar() const = 0;
   virtual ScrollbarOrientation orientation() const = 0;
   virtual bool isLeftSideVerticalScrollbar() const = 0;
 
@@ skipping 18 matching lines @@
   virtual float elasticOverscroll() const = 0;
   virtual void setElasticOverscroll(float) = 0;
 
  protected:
   virtual ~ScrollbarThemeClient() {}
 };
 
 }  // namespace blink
 
 #endif  // ScollbarThemeClient_h