DO NOT REVIEW Plumb push messaging registration through to gcm.

content/public/browser/push_messaging_service.h

+// 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.
+
+#ifndef CONTENT_PUBLIC_BROWSER_PUSH_MESSAGING_SERVICE_H_
+#define CONTENT_PUBLIC_BROWSER_PUSH_MESSAGING_SERVICE_H_
+
+#include <string>
+
+#include "base/callback.h"
+#include "content/common/content_export.h"
+#include "content/public/common/push_messaging_status.h"
+
+namespace content {
+
+class CONTENT_EXPORT PushMessagingService {
+ public:
+  typedef base::Callback<void(const std::string& /* registration_id */,
+                              PushMessagingStatus /* status */)>
+      RegisterCallback;
+
+  virtual ~PushMessagingService() {}
+  virtual void Register(RegisterCallback) = 0;
+};
+
+}  // namespace content
+
+#endif  // CONTENT_PUBLIC_BROWSER_PUSH_MESSAGING_SERVICE_H_