MacViews: Overlay Scrollbars with Show/Hide Animations

ui/views/style/platform_style.h

Index: ui/views/style/platform_style.h
diff --git a/ui/views/style/platform_style.h b/ui/views/style/platform_style.h
index e56fe0e30ba41263550095c37f381c195b0cf850..3058142db075fdf98885cd092b5a3d12abf826a0 100644
--- a/ui/views/style/platform_style.h
+++ b/ui/views/style/platform_style.h
@@ -8,6 +8,7 @@
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "ui/views/controls/button/button.h"
+#include "ui/views/controls/scrollbar/scroll_bar.h"
 
 namespace views {
 
@@ -26,6 +27,8 @@ class PlatformStyle {
   // Applies the current system theme to the default border created by |button|.
   static scoped_ptr<Border> CreateThemedLabelButtonBorder(LabelButton* button);
 
+  static scoped_ptr<ScrollBar> CreateScrollBar(bool is_horizontal);
+
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(PlatformStyle);
 };