Push API: use an enum to indicate status.

chrome/browser/services/gcm/push_messaging_service_impl.h

Index: chrome/browser/services/gcm/push_messaging_service_impl.h
diff --git a/chrome/browser/services/gcm/push_messaging_service_impl.h b/chrome/browser/services/gcm/push_messaging_service_impl.h
index d0cd97d6cf1ddd48bb8706a25254fba0cfa2ae42..eceb81df2ddd9c41265cd1ac4d9434e9617bfb7d 100644
--- a/chrome/browser/services/gcm/push_messaging_service_impl.h
+++ b/chrome/browser/services/gcm/push_messaging_service_impl.h
@@ -10,6 +10,7 @@
 #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;
 
@@ -54,6 +55,12 @@ class PushMessagingServiceImpl : public content::PushMessagingService,
       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,