Aura overlay scrollbars adjust color for dark backgrounds

third_party/WebKit/Source/core/frame/FrameView.h

 /*
    Copyright (C) 1997 Martin Jones (mjones@kde.org)
              (C) 1998 Waldo Bastian (bastian@kde.org)
              (C) 1998, 1999 Torben Weis (weis@kde.org)
              (C) 1999 Lars Knoll (knoll@kde.org)
              (C) 1999 Antti Koivisto (koivisto@kde.org)
    Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights
    reserved.
 
    This library is free software; you can redistribute it and/or
@@ skipping 325 matching lines @@
   void setCursor(const Cursor&);
 
   bool scrollbarsCanBeActive() const override;
   void scrollbarVisibilityChanged() override;
 
   // FIXME: Remove this method once plugin loading is decoupled from layout.
   void flushAnyPendingPostLayoutTasks();
 
   bool shouldSuspendScrollAnimations() const override;
   void scrollbarStyleChanged() override;
+  ScrollbarOverlayStyle getScrollbarOverlayStyle() const override;
 
   LayoutReplaced* embeddedReplacedContent() const;
 
   static void setInitialTracksPaintInvalidationsForTesting(bool);
 
   // These methods are for testing.
   void setTracksPaintInvalidations(bool);
   bool isTrackingPaintInvalidations() const {
     return m_trackedObjectPaintInvalidations.get();
   }
@@ skipping 751 matching lines @@
                   widget.isFrameView());
 DEFINE_TYPE_CASTS(FrameView,
                   ScrollableArea,
                   scrollableArea,
                   scrollableArea->isFrameView(),
                   scrollableArea.isFrameView());
 
 }  // namespace blink
 
 #endif  // FrameView_h