Aura overlay scrollbars adjust color for dark backgrounds

third_party/WebKit/Source/core/paint/PaintLayerScrollableArea.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights
  * reserved.
  *
  * Portions are Copyright (C) 1998 Netscape Communications Corporation.
  *
  * Other contributors:
  *   Robert O'Callahan <roc+@cs.cmu.edu>
  *   David Baron <dbaron@fas.harvard.edu>
  *   Christian Biesinger <cbiesinger@gmail.com>
@@ skipping 955 matching lines @@
   // overlay style might need to be changed to have contrast against the
   // background.
   Color oldBackground;
   if (oldStyle) {
     oldBackground = oldStyle->visitedDependentColor(CSSPropertyBackgroundColor);
   }
   Color newBackground =
       box().style()->visitedDependentColor(CSSPropertyBackgroundColor);
 
   if (newBackground != oldBackground) {
-    recalculateScrollbarOverlayStyle(newBackground);
+    recalculateScrollbarOverlayColorTheme(newBackground);
   }
 }
 
 bool PaintLayerScrollableArea::updateAfterCompositingChange() {
   layer()->updateScrollingStateAfterCompositingChange();
   const bool layersChanged = m_topmostScrollChild != m_nextTopmostScrollChild;
   m_topmostScrollChild = m_nextTopmostScrollChild;
   m_nextTopmostScrollChild = nullptr;
   return layersChanged;
 }
@@ skipping 996 matching lines @@
 
 void PaintLayerScrollableArea::DelayScrollOffsetClampScope::
     clampScrollableAreas() {
   for (auto& scrollableArea : *s_needsClamp)
     scrollableArea->clampScrollOffsetsAfterLayout();
   delete s_needsClamp;
   s_needsClamp = nullptr;
 }
 
 }  // namespace blink