Push API: test that default notification is shown on Android when needed.

chrome/browser/push_messaging/push_messaging_service_observer.cc

Index: chrome/browser/push_messaging/push_messaging_service_observer.cc
diff --git a/chrome/browser/push_messaging/push_messaging_service_observer.cc b/chrome/browser/push_messaging/push_messaging_service_observer.cc
new file mode 100644
index 0000000000000000000000000000000000000000..8608639f20270ee5237b27fb12ac2ea0714a37fd
--- /dev/null
+++ b/chrome/browser/push_messaging/push_messaging_service_observer.cc
@@ -0,0 +1,21 @@
+// 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 "chrome/browser/push_messaging/push_messaging_service_observer.h"
+
+#include "build/build_config.h"
+
+#if defined(OS_ANDROID)
+#include "chrome/browser/push_messaging/push_messaging_service_observer_android.h"
+#endif
+
+// static
+scoped_ptr<PushMessagingServiceObserver>
+PushMessagingServiceObserver::Create() {
+  scoped_ptr<PushMessagingServiceObserver> observer;
+#if defined(OS_ANDROID)
+  observer.reset(new PushMessagingServiceObserverAndroid());

[Bernhard Bauer, 2015/12/11 16:35:57]

You could also `return make_scoped_ptr(new ...)`, but up to you.

[Michael van Ouwerkerk, 2015/12/11 17:57:02]

So a nullptr cannot be passed to make_scoped_ptr, but it can simply be returned
and coerced into a scoped_ptr. Cool. Done.

+#endif
+  return observer;
+}