Make Mandoline shut down cleanly.

mojo/application/app_lifetime_helper.cc

+// Copyright 2015 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/application/app_lifetime_helper.h"
+
+#include "base/time/tick_clock.h"
+#include "third_party/mojo/src/mojo/public/cpp/application/application_impl.h"
+
+namespace mojo {
+
+ServiceRefcount::ServiceRefcount(AppLifetimeHelper* app_lifetime_helper)
+    : app_lifetime_helper_(app_lifetime_helper) {
+}
+
+ServiceRefcount::~ServiceRefcount() {
+  app_lifetime_helper_->Release();
+}
+
+AppLifetimeHelper::AppLifetimeHelper() : ref_count_(0) {
+}
+
+AppLifetimeHelper::~AppLifetimeHelper() {
+}
+
+scoped_ptr<ServiceRefcount> AppLifetimeHelper::CreateServiceRefCount() {
+  ref_count_++;
+  return make_scoped_ptr(new ServiceRefcount(this));
+}
+
+void AppLifetimeHelper::Release() {
+  if (!--ref_count_)
+    ApplicationImpl::Terminate();
+}
+
+}  // namespace mojo