Shutdown cleanup

mojo/examples/compositor_app/compositor_app.cc

Index: mojo/examples/compositor_app/compositor_app.cc
diff --git a/mojo/examples/compositor_app/compositor_app.cc b/mojo/examples/compositor_app/compositor_app.cc
index 6a5a8c45fa3ee28bf07277977a5e6d467261ae9a..54aa23578ce9f91742fbe44dc136fd6cea8e1215 100644
--- a/mojo/examples/compositor_app/compositor_app.cc
+++ b/mojo/examples/compositor_app/compositor_app.cc
@@ -39,8 +39,9 @@ class SampleApp : public ApplicationDelegate, public NativeViewportClient {
   virtual void OnCreated() OVERRIDE {
   }
 
-  virtual void OnDestroyed() OVERRIDE {
+  virtual void OnDestroyed(const mojo::Callback<void()>& callback) OVERRIDE {
     base::MessageLoop::current()->Quit();
+    callback.Run();
   }
 
   virtual void OnBoundsChanged(RectPtr bounds) OVERRIDE {