make menus, bubbles, etc. top level windows on aura

ui/compositor/layer.h

Index: ui/compositor/layer.h
diff --git a/ui/compositor/layer.h b/ui/compositor/layer.h
index 5565e0843524d13903515fb9728c9d57b39811ac..f8e625a44c0422d5f29aa97b8584d78ed80356ba 100644
--- a/ui/compositor/layer.h
+++ b/ui/compositor/layer.h
@@ -224,6 +224,12 @@ class COMPOSITOR_EXPORT Layer
                                   const Layer* target,
                                   gfx::Point* point);
 
+  // Converts a transform to be relative to the given |ancestor|. Returns
+  // whether success (that is, whether the given ancestor was really an
+  // ancestor of this layer).
+  bool GetTargetTransformRelativeTo(const Layer* ancestor,
+                                    gfx::Transform* transform) const;
+
   // Converts a ui::Layer's transform to the transform on the corresponding
   // cc::Layer.
   static gfx::Transform ConvertTransformToCCTransform(
@@ -324,9 +330,6 @@ class COMPOSITOR_EXPORT Layer
   bool ConvertPointForAncestor(const Layer* ancestor, gfx::Point* point) const;
   bool ConvertPointFromAncestor(const Layer* ancestor, gfx::Point* point) const;
 
-  bool GetTargetTransformRelativeTo(const Layer* ancestor,
-                                    gfx::Transform* transform) const;
-
   // Following are invoked from the animation or if no animation exists to
   // update the values immediately.
   void SetBoundsImmediately(const gfx::Rect& bounds);