Don't use base::MessageLoop::{Quit,QuitClosure} in mojo/

mojo/services/test_service/test_service_application.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "mojo/services/test_service/test_service_application.h"
 
 #include <assert.h>
 
 #include "mojo/application/public/cpp/application_connection.h"
 #include "mojo/application/public/cpp/application_runner.h"
@@ skipping 35 matching lines @@
 
 void TestServiceApplication::AddRef() {
   assert(ref_count_ >= 0);
   ref_count_++;
 }
 
 void TestServiceApplication::ReleaseRef() {
   assert(ref_count_ > 0);
   ref_count_--;
   if (ref_count_ <= 0)
-    base::MessageLoop::current()->Quit();
+    base::MessageLoop::current()->QuitWhenIdle();
 }
 
 }  // namespace test
 }  // namespace mojo
 
 MojoResult MojoMain(MojoHandle shell_handle) {
   mojo::ApplicationRunner runner(new mojo::test::TestServiceApplication);
   return runner.Run(shell_handle);
 }