Add a test for application lifecycle

mojo/shell/tests/lifecycle/app_client.h

Index: mojo/shell/tests/lifecycle/app_client.h
diff --git a/mojo/shell/tests/lifecycle/app_client.h b/mojo/shell/tests/lifecycle/app_client.h
new file mode 100644
index 0000000000000000000000000000000000000000..5a7d5e6c2e32355a79793b40c6ecf18113174dac
--- /dev/null
+++ b/mojo/shell/tests/lifecycle/app_client.h
@@ -0,0 +1,64 @@
+// Copyright 2016 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.
+
+#ifndef MOJO_SHELL_TESTS_LIFECYCLE_APP_CLIENT_H_
+#define MOJO_SHELL_TESTS_LIFECYCLE_APP_CLIENT_H_
+
+#include "base/bind.h"
+#include "base/macros.h"
+#include "mojo/public/cpp/bindings/binding_set.h"
+#include "mojo/shell/public/cpp/application_runner.h"
+#include "mojo/shell/public/cpp/interface_factory.h"
+#include "mojo/shell/public/cpp/shell_client.h"
+#include "mojo/shell/public/interfaces/shell_client.mojom.h"
+#include "mojo/shell/tests/lifecycle/lifecycle_unittest.mojom.h"
+
+using LifecycleControl = mojo::shell::test::mojom::LifecycleControl;
+using LifecycleControlRequest =
+    mojo::shell::test::mojom::LifecycleControlRequest;
+
+namespace mojo {
+class ShellConnection;
+namespace shell {
+namespace test {
+
+class AppClient : public ShellClient,
+                  public InterfaceFactory<LifecycleControl>,
+                  public LifecycleControl {
+ public:
+  AppClient();
+  explicit AppClient(shell::mojom::ShellClientRequest request);
+  ~AppClient() override;
+
+  void set_runner(ApplicationRunner* runner) {
+    runner_ = runner;
+  }
+
+  // ShellClient:
+  bool AcceptConnection(Connection* connection) override;
+
+  // InterfaceFactory<LifecycleControl>:
+  void Create(Connection* connection, LifecycleControlRequest request) override;
+
+  // LifecycleControl:
+  void Ping(const PingCallback& callback) override;
+  void GracefulQuit() override;
+  void Crash() override;
+  void CloseShellConnection() override;
+
+ private:
+  void BindingLost();
+
+  ApplicationRunner* runner_ = nullptr;
+  BindingSet<LifecycleControl> bindings_;
+  scoped_ptr<ShellConnection> connection_;
+
+  DISALLOW_COPY_AND_ASSIGN(AppClient);
+};
+
+}  // namespace test
+}  // namespace shell
+}  // namespace mojo
+
+#endif  // MOJO_SHELL_TESTS_LIFECYCLE_APP_CLIENT_H_