Aura overlay scrollbars adjust color for dark backgrounds

ui/native_theme/native_theme_aura.h

Index: ui/native_theme/native_theme_aura.h
diff --git a/ui/native_theme/native_theme_aura.h b/ui/native_theme/native_theme_aura.h
index 85ce5bc708dbdfc1c4ad38697cca6aec0453a206..06ebdd6da5d43e7e2c91f6b896c69545e3ac96f1 100644
--- a/ui/native_theme/native_theme_aura.h
+++ b/ui/native_theme/native_theme_aura.h
@@ -42,17 +42,20 @@ class NATIVE_THEME_EXPORT NativeThemeAura : public NativeThemeBase {
   void PaintScrollbarThumb(SkCanvas* canvas,
                            Part part,
                            State state,
-                           const gfx::Rect& rect) const override;
+                           const gfx::Rect& rect,
+                           ScrollbarOverlayStyle style) const override;
   void PaintScrollbarCorner(SkCanvas* canvas,
                             State state,
                             const gfx::Rect& rect) const override;
 
-  void PaintScrollbarThumbStateTransition(SkCanvas* canvas,
-                                          Part part,
-                                          State startState,
-                                          State endState,
-                                          double progress,
-                                          const gfx::Rect& rect) const override;
+  void PaintScrollbarThumbStateTransition(
+      SkCanvas* canvas,
+      Part part,
+      State startState,
+      State endState,
+      double progress,
+      const gfx::Rect& rect,
+      ScrollbarOverlayStyle style) const override;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(NativeThemeAura);