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 5c95a36a7da8fb27b7df25121a54c8631d3a12fe..61ea5b2c358745f30b8a9389935d08fa537f39cf 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(
@@ -328,9 +334,6 @@ 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);