Add a test for application lifecycle

mojo/shell/public/cpp/lib/application_runner.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/shell/public/cpp/application_runner.h"
 
 #include "base/at_exit.h"
 #include "base/command_line.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_loop.h"
@@ skipping 36 matching lines @@
     at_exit.reset(new base::AtExitManager);
   }
 
   {
     scoped_ptr<base::MessageLoop> loop;
     if (message_loop_type_ == base::MessageLoop::TYPE_CUSTOM)
       loop.reset(new base::MessageLoop(common::MessagePumpMojo::Create()));
     else
       loop.reset(new base::MessageLoop(message_loop_type_));
 
-    ShellConnection impl(client_.get(),
-                         MakeRequest<shell::mojom::ShellClient>(
-                            MakeScopedHandle(MessagePipeHandle(
-                                shell_client_request_handle))));
+    connection_.reset(new ShellConnection(
+        client_.get(),
+        MakeRequest<shell::mojom::ShellClient>(MakeScopedHandle(
+            MessagePipeHandle(shell_client_request_handle)))));
     loop->Run();
     // It's very common for the client to cache the app and terminate on errors.
     // If we don't delete the client before the app we run the risk of the
     // client having a stale reference to the app and trying to use it.
     // Note that we destruct the message loop first because that might trigger
     // connection error handlers and they might access objects created by the
     // client.
     loop.reset();
     client_.reset();
+    connection_.reset();
   }
   return MOJO_RESULT_OK;
 }
 
 MojoResult ApplicationRunner::Run(MojoHandle shell_client_request_handle) {
   bool init_base = true;
   if (base::CommandLine::InitializedForCurrentProcess()) {
     init_base =
         !base::CommandLine::ForCurrentProcess()->HasSwitch("single-process");
   }
   return Run(shell_client_request_handle, init_base);
 }
 
+void ApplicationRunner::DestroyShellConnection() {
+  connection_.reset();
+}
+
 }  // namespace mojo