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

ui/aura/window_delegate.h

Index: ui/aura/window_delegate.h
diff --git a/ui/aura/window_delegate.h b/ui/aura/window_delegate.h
index bcbd2a6984ccc758c48607fc853f4b7fbc981402..70db9960cab451b85c031aedc9e1b6bd7d648950 100644
--- a/ui/aura/window_delegate.h
+++ b/ui/aura/window_delegate.h
@@ -39,6 +39,10 @@ class AURA_EXPORT WindowDelegate : public ui::EventHandler {
   // Returns the window's maximum size, or size 0,0 if there is no limit.
   virtual gfx::Size GetMaximumSize() const = 0;
 
+  // Ensure the host window is at least this large so that transitions have
+  // sufficient space.
+  virtual void SetHostTransitionBounds(const gfx::Rect& bounds) = 0;
+
   // Called when the Window's position and/or size changes.
   virtual void OnBoundsChanged(const gfx::Rect& old_bounds,
                                const gfx::Rect& new_bounds) = 0;
@@ -69,6 +73,9 @@ class AURA_EXPORT WindowDelegate : public ui::EventHandler {
   // Called when the window's device scale factor has changed.
   virtual void OnDeviceScaleFactorChanged(float device_scale_factor) = 0;
 
+  // Called after the window has faded out on a hide.
+  virtual void OnWindowHidingAnimationCompleted() = 0;
+
   // Called from Window's destructor before OnWindowDestroyed and before the
   // children have been destroyed and the window has been removed from its
   // parent.