Aura overlay scrollbars adjust color for dark backgrounds

third_party/WebKit/Source/platform/scroll/ScrollableArea.h

Index: third_party/WebKit/Source/platform/scroll/ScrollableArea.h
diff --git a/third_party/WebKit/Source/platform/scroll/ScrollableArea.h b/third_party/WebKit/Source/platform/scroll/ScrollableArea.h
index d921b2d2da5ffc99455b6c1fbf51ea7aba599a2b..17802ed6a3ff26305b8a23f95e16c7a16e7fe54c 100644
--- a/third_party/WebKit/Source/platform/scroll/ScrollableArea.h
+++ b/third_party/WebKit/Source/platform/scroll/ScrollableArea.h
@@ -120,10 +120,11 @@ class PLATFORM_EXPORT ScrollableArea : public GarbageCollectedMixin {
   virtual void contentsResized();
 
   bool hasOverlayScrollbars() const;
-  void setScrollbarOverlayStyle(ScrollbarOverlayStyle);
-  void recalculateScrollbarOverlayStyle(Color);
-  ScrollbarOverlayStyle getScrollbarOverlayStyle() const {
-    return static_cast<ScrollbarOverlayStyle>(m_scrollbarOverlayStyle);
+  void setScrollbarOverlayColorTheme(ScrollbarOverlayColorTheme);
+  void recalculateScrollbarOverlayColorTheme(Color);
+  ScrollbarOverlayColorTheme getScrollbarOverlayColorTheme() const {
+    return static_cast<ScrollbarOverlayColorTheme>(
+        m_scrollbarOverlayColorTheme);
   }
 
   // This getter will create a ScrollAnimatorBase if it doesn't already exist.
@@ -390,7 +391,7 @@ class PLATFORM_EXPORT ScrollableArea : public GarbageCollectedMixin {
   mutable Member<ScrollAnimatorBase> m_scrollAnimator;
   mutable Member<ProgrammaticScrollAnimator> m_programmaticScrollAnimator;
 
-  unsigned m_scrollbarOverlayStyle : 2;  // ScrollbarOverlayStyle
+  unsigned m_scrollbarOverlayColorTheme : 2;
 
   unsigned m_scrollOriginChanged : 1;