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

chrome/browser/push_messaging/push_messaging_service_observer.h

+// 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.
+
+#ifndef CHROME_BROWSER_PUSH_MESSAGING_PUSH_MESSAGING_SERVICE_OBSERVER_H_
+#define CHROME_BROWSER_PUSH_MESSAGING_PUSH_MESSAGING_SERVICE_OBSERVER_H_
+
+// Observes events and changes in the PushMessagingService.
+//
+// Note: this class is to be used in tests only.

[Bernhard Bauer, 2015/12/11 12:28:42]

Name it ...ForTesting or ...TestingObserver then?

[Michael van Ouwerkerk, 2015/12/11 16:05:56]

I've deleted this bit and expanded the comment in
PushMessagingServiceObserver.java instead, where there is more context about how
to clean this up in future.

+class PushMessagingServiceObserver {
+ public:
+  // Creates a new PushMessagingServiceObserver. Caller takes ownership.

[Bernhard Bauer, 2015/12/11 12:28:42]

Return a scoped_ptr then?

[Michael van Ouwerkerk, 2015/12/11 16:05:56]

Done.

+  static PushMessagingServiceObserver* Create();
+
+  // Called when a push message has been fully handled.
+  virtual void OnMessageHandled() = 0;
+};
+
+#endif  // CHROME_BROWSER_PUSH_MESSAGING_PUSH_MESSAGING_SERVICE_OBSERVER_H_