Push API: use an enum to indicate status.

chrome/browser/services/gcm/push_messaging_service_impl.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 CHROME_BROWSER_SERVICES_GCM_PUSH_MESSAGING_SERVICE_IMPL_H_
 #define CHROME_BROWSER_SERVICES_GCM_PUSH_MESSAGING_SERVICE_IMPL_H_
 
 #include "base/compiler_specific.h"
 #include "base/memory/weak_ptr.h"
 #include "components/gcm_driver/gcm_app_handler.h"
 #include "components/gcm_driver/gcm_client.h"
 #include "content/public/browser/push_messaging_service.h"
+#include "content/public/common/push_messaging_status.h"
 
 class Profile;
 
 namespace user_prefs {
 class PrefRegistrySyncable;
 }
 
 namespace gcm {
 
 class GCMProfileService;
@@ skipping 24 matching lines @@
   // content::PushMessagingService implementation:
   virtual void Register(
       const std::string& app_id,
       const std::string& sender_id,
       int renderer_id,
       int render_frame_id,
       bool user_gesture,
       const content::PushMessagingService::RegisterCallback& callback) OVERRIDE;
 
  private:
+  void RegisterEnd(
+      const std::string& app_id,
+      const content::PushMessagingService::RegisterCallback& callback,
+      const std::string& registration_id,
+      content::PushMessagingStatus status);
+
   void DidRegister(
       const std::string& app_id,
       const content::PushMessagingService::RegisterCallback& callback,
       const std::string& registration_id,
       GCMClient::Result result);
 
   void DidRequestPermission(
       const std::string& sender_id,
       const std::string& app_id,
       const content::PushMessagingService::RegisterCallback& callback,
       bool allow);
 
   GCMProfileService* gcm_profile_service_;  // It owns us.
 
   Profile* profile_;  // It owns our owner.
 
   base::WeakPtrFactory<PushMessagingServiceImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(PushMessagingServiceImpl);
 };
 
 }  // namespace gcm
 
 #endif  // CHROME_BROWSER_SERVICES_GCM_PUSH_MESSAGING_SERVICE_IMPL_H_