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

ui/aura/demo/demo_main.cc

Index: ui/aura/demo/demo_main.cc
diff --git a/ui/aura/demo/demo_main.cc b/ui/aura/demo/demo_main.cc
index e78940bd809826a22e5d2a613b88f1a078ad438b..8113c654030c4e35c9a92cf6854f9492ce7f972a 100644
--- a/ui/aura/demo/demo_main.cc
+++ b/ui/aura/demo/demo_main.cc
@@ -43,6 +43,8 @@ class DemoWindowDelegate : public aura::WindowDelegate {
     return gfx::Size();
   }
 
+  virtual void SetHostTransitionBounds(const gfx::Rect& bounds) OVERRIDE {}
+
   virtual void OnBoundsChanged(const gfx::Rect& old_bounds,
                                const gfx::Rect& new_bounds) OVERRIDE {}
   virtual gfx::NativeCursor GetCursor(const gfx::Point& point) OVERRIDE {
@@ -62,6 +64,7 @@ class DemoWindowDelegate : public aura::WindowDelegate {
     canvas->DrawColor(color_, SkXfermode::kSrc_Mode);
   }
   virtual void OnDeviceScaleFactorChanged(float device_scale_factor) OVERRIDE {}
+  virtual void OnWindowHidingAnimationCompleted() OVERRIDE {}
   virtual void OnWindowDestroying() OVERRIDE {}
   virtual void OnWindowDestroyed() OVERRIDE {}
   virtual void OnWindowTargetVisibilityChanged(bool visible) OVERRIDE {}