Reify view ownership as a message pipe.

examples/ui/spinning_cube/spinning_cube_app.cc

Index: examples/ui/spinning_cube/spinning_cube_app.cc
diff --git a/examples/ui/spinning_cube/spinning_cube_app.cc b/examples/ui/spinning_cube/spinning_cube_app.cc
index 79818ee24142e4975daec67fc3d161de277886f1..8c1d7975abdb15f8ea35077d1afb90d781734f99 100644
--- a/examples/ui/spinning_cube/spinning_cube_app.cc
+++ b/examples/ui/spinning_cube/spinning_cube_app.cc
@@ -12,13 +12,12 @@ SpinningCubeApp::SpinningCubeApp() {}
 
 SpinningCubeApp::~SpinningCubeApp() {}
 
-bool SpinningCubeApp::CreateView(
+void SpinningCubeApp::CreateView(
     const std::string& connection_url,
+    mojo::InterfaceRequest<mojo::ui::ViewOwner> view_owner_request,
     mojo::InterfaceRequest<mojo::ServiceProvider> services,
-    mojo::ServiceProviderPtr exposed_services,
-    const mojo::ui::ViewProvider::CreateViewCallback& callback) {
-  new SpinningCubeView(app_impl(), callback);
-  return true;
+    mojo::ServiceProviderPtr exposed_services) {
+  new SpinningCubeView(app_impl(), view_owner_request.Pass());
 }
 
 }  // namespace examples