[Push] Register: require user-visible to be present in the manifest

chrome/browser/services/gcm/push_messaging_service_impl.cc

Index: chrome/browser/services/gcm/push_messaging_service_impl.cc
diff --git a/chrome/browser/services/gcm/push_messaging_service_impl.cc b/chrome/browser/services/gcm/push_messaging_service_impl.cc
index b0006ba5fcb976a24fbed378ec5fd24872d6357c..1eb7f85374cf274311a0111c865096778ff9fcd4 100644
--- a/chrome/browser/services/gcm/push_messaging_service_impl.cc
+++ b/chrome/browser/services/gcm/push_messaging_service_impl.cc
@@ -275,7 +275,7 @@ void PushMessagingServiceImpl::RegisterFromDocument(
   gcm::PushMessagingPermissionContext* permission_context =
       gcm::PushMessagingPermissionContextFactory::GetForProfile(profile_);
 
-  if (permission_context == NULL) {
+  if (permission_context == NULL || !user_visible_only) {
     RegisterEnd(callback,
                 std::string(),
                 content::PUSH_REGISTRATION_STATUS_PERMISSION_DENIED);