Aura overlay scrollbars adjust color for dark backgrounds

third_party/WebKit/public/platform/WebScrollbar.h

Index: third_party/WebKit/public/platform/WebScrollbar.h
diff --git a/third_party/WebKit/public/platform/WebScrollbar.h b/third_party/WebKit/public/platform/WebScrollbar.h
index a921510206fb7d2af93beac9217fc59503971693..fab759d80c4d7f24b037bd1b4774b51c2df9f1a3 100644
--- a/third_party/WebKit/public/platform/WebScrollbar.h
+++ b/third_party/WebKit/public/platform/WebScrollbar.h
@@ -62,10 +62,10 @@ class BLINK_PLATFORM_EXPORT WebScrollbar {
     AllParts = 0xffffffff
   };
 
-  enum ScrollbarOverlayStyle {
-    ScrollbarOverlayStyleDefault,
-    ScrollbarOverlayStyleDark,
-    ScrollbarOverlayStyleLight
+  enum ScrollbarOverlayColorTheme {
+    ScrollbarOverlayColorThemeDefault,
+    ScrollbarOverlayColorThemeDark,
+    ScrollbarOverlayColorThemeLight
   };
 
   virtual ~WebScrollbar() {}
@@ -86,7 +86,7 @@ class BLINK_PLATFORM_EXPORT WebScrollbar {
   virtual ScrollbarControlSize controlSize() const = 0;
   virtual ScrollbarPart pressedPart() const = 0;
   virtual ScrollbarPart hoveredPart() const = 0;
-  virtual ScrollbarOverlayStyle scrollbarOverlayStyle() const = 0;
+  virtual ScrollbarOverlayColorTheme scrollbarOverlayColorTheme() const = 0;
   virtual bool isCustomScrollbar() const = 0;
   virtual Orientation orientation() const = 0;
   virtual bool isLeftSideVerticalScrollbar() const = 0;