Mojo: Use InterfaceFactory<Interface> for service registration

mojo/public/cpp/application/lib/mojo_main_chromium.cc

Index: mojo/public/cpp/application/lib/mojo_main_chromium.cc
diff --git a/mojo/public/cpp/application/lib/mojo_main_chromium.cc b/mojo/public/cpp/application/lib/mojo_main_chromium.cc
index 269b7a2f036ab77636ee22986420280671c62be4..d8c5e3f643493ecc9f6e0591d0746e2c7c9f855e 100644
--- a/mojo/public/cpp/application/lib/mojo_main_chromium.cc
+++ b/mojo/public/cpp/application/lib/mojo_main_chromium.cc
@@ -14,12 +14,16 @@ extern "C" APPLICATION_EXPORT MojoResult CDECL MojoMain(
 #if !defined(COMPONENT_BUILD)
   base::AtExitManager at_exit;
 #endif
-  base::MessageLoop loop;
-  scoped_ptr<mojo::ApplicationDelegate> delegate(
-      mojo::ApplicationDelegate::Create());
-  mojo::ApplicationImpl app(delegate.get());
-  app.BindShell(shell_handle);
-  loop.Run();
+  scoped_ptr<mojo::ApplicationDelegate> delegate;
+  {
+    // We have to shut down the MessageLoop before destroying the
+    // ApplicationDelegate.
+    base::MessageLoop loop;
+    delegate.reset(mojo::ApplicationDelegate::Create());
+    mojo::ApplicationImpl app(delegate.get());
+    app.BindShell(shell_handle);
+    loop.Run();
+  }
 
   return MOJO_RESULT_OK;
 }