Make ApplicationRunner's ctor's ApplicationDelegate* argument an std::unique_ptr instead.

examples/audio_play_test/play_tone.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 <math.h>
 #include <memory>
 
 #include "mojo/public/c/system/main.h"
 #include "mojo/public/cpp/application/application_delegate.h"
 #include "mojo/public/cpp/application/application_impl.h"
@@ skipping 225 matching lines @@
   audio_server_.reset();
   RunLoop::current()->Quit();
 }
 
 }  // namespace examples
 }  // namespace audio
 }  // namespace media
 }  // namespace mojo
 
 MojoResult MojoMain(MojoHandle app_request) {
-  mojo::ApplicationRunner runner(new mojo::media::audio::examples::PlayToneApp);
+  mojo::ApplicationRunner runner(
+      std::unique_ptr<mojo::media::audio::examples::PlayToneApp>(
+          new mojo::media::audio::examples::PlayToneApp()));
   return runner.Run(app_request);
 }