Scroll with Layers in views::ScrollView

ui/views/view.h

Index: ui/views/view.h
diff --git a/ui/views/view.h b/ui/views/view.h
index 6b45c6313baf3bee9f08047d3891e28b35de22d1..b1764ce58c85cae9d9d8e0ea7bf3011f14503d0f 100644
--- a/ui/views/view.h
+++ b/ui/views/view.h
@@ -970,6 +970,10 @@ class VIEWS_EXPORT View : public ui::LayerDelegate,
   // the child view, such as Viewport, to override appropriately.
   virtual void ScrollRectToVisible(const gfx::Rect& rect);
 
+  // The closest parent() ScrollView in the hierarchy enclosing this View. Null
+  // if there is none.
+  virtual ScrollView* EnclosingScrollView();
+
   // The following methods are used by ScrollView to determine the amount
   // to scroll relative to the visible bounds of the view. For example, a
   // return value of 10 indicates the scrollview should scroll 10 pixels in