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

examples/audio_play_test/play_wav.cc

Index: examples/audio_play_test/play_wav.cc
diff --git a/examples/audio_play_test/play_wav.cc b/examples/audio_play_test/play_wav.cc
index d4706b02c6ae74464e954831d0b4f0d6b6c4349b..3cc1ce6828a96e693a59a1da5da807365c2c076f 100644
--- a/examples/audio_play_test/play_wav.cc
+++ b/examples/audio_play_test/play_wav.cc
@@ -563,6 +563,8 @@ void PlayWAVApp::BeginShutdown() {
 }  // namespace mojo
 
 MojoResult MojoMain(MojoHandle app_request) {
-  mojo::ApplicationRunner runner(new mojo::media::audio::examples::PlayWAVApp);
+  mojo::ApplicationRunner runner(
+      std::unique_ptr<mojo::media::audio::examples::PlayWAVApp>(
+          new mojo::media::audio::examples::PlayWAVApp()));
   return runner.Run(app_request);
 }