MacViews: Overlay Scrollbars with Show/Hide Animations

ui/views/controls/scrollbar/native_scroll_bar.h

Index: ui/views/controls/scrollbar/native_scroll_bar.h
diff --git a/ui/views/controls/scrollbar/native_scroll_bar.h b/ui/views/controls/scrollbar/native_scroll_bar.h
index c9d96af77e7efc62bb73d52ccb3b49c175e03298..2045bf4485f4d148c3cf20233b237f34f3ba54ca 100644
--- a/ui/views/controls/scrollbar/native_scroll_bar.h
+++ b/ui/views/controls/scrollbar/native_scroll_bar.h
@@ -36,6 +36,9 @@ class VIEWS_EXPORT NativeScrollBar : public ScrollBar {
   static int GetHorizontalScrollBarHeight(const ui::NativeTheme* theme);
   static int GetVerticalScrollBarWidth(const ui::NativeTheme* theme);
 
+ protected:
+  virtual NativeScrollBarWrapper* CreateWrapper();
+
  private:
   friend class NativeScrollBarTest;
   FRIEND_TEST_ALL_PREFIXES(NativeScrollBarTest, Scrolling);