Make Mandoline shut down cleanly.

mojo/application/app_lifetime_helper.cc

Index: mojo/application/app_lifetime_helper.cc
diff --git a/mojo/application/app_lifetime_helper.cc b/mojo/application/app_lifetime_helper.cc
new file mode 100644
index 0000000000000000000000000000000000000000..09733d9a40eb924ebaa0d553c1886cbf7e523cd8
--- /dev/null
+++ b/mojo/application/app_lifetime_helper.cc
@@ -0,0 +1,44 @@
+// 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 {
+
+AppRefCount::AppRefCount(
+    const base::WeakPtr<AppLifetimeHelper>& app_lifetime_helper)
+    : app_lifetime_helper_(app_lifetime_helper) {
+}
+
+AppRefCount::~AppRefCount() {
+  // We have to null check first because at launcher shutdown it is valid that
+  // the app goes away while there are outstanding service objects.
+  if (app_lifetime_helper_)
+    app_lifetime_helper_->Release();
+}
+
+scoped_ptr<AppRefCount> AppRefCount::Clone() {
+  return app_lifetime_helper_->CreateAppRefCount();
+}
+
+AppLifetimeHelper::AppLifetimeHelper() : ref_count_(0), weak_factory_(this) {
+}
+
+AppLifetimeHelper::~AppLifetimeHelper() {
+}
+
+scoped_ptr<AppRefCount> AppLifetimeHelper::CreateAppRefCount() {
+  ref_count_++;
+  return make_scoped_ptr(new AppRefCount(weak_factory_.GetWeakPtr()));
+}
+
+void AppLifetimeHelper::Release() {
+  if (!--ref_count_)
+    ApplicationImpl::Terminate();
+}
+
+}  // namespace mojo