[Sync] Propagate XMPP auth errors to SyncNotifierObservers

chrome/service/cloud_print/cloud_print_proxy_backend.cc

Index: chrome/service/cloud_print/cloud_print_proxy_backend.cc
diff --git a/chrome/service/cloud_print/cloud_print_proxy_backend.cc b/chrome/service/cloud_print/cloud_print_proxy_backend.cc
index e14e33b3a584abe4ee3c9c49de4389f8a4b49449..e3db09062463fa184cbb35588fb7eb5f1e6ecb2b 100644
--- a/chrome/service/cloud_print/cloud_print_proxy_backend.cc
+++ b/chrome/service/cloud_print/cloud_print_proxy_backend.cc
@@ -88,8 +88,8 @@ class CloudPrintProxyBackend::Core
   virtual void OnAuthFailed() OVERRIDE;
 
   // notifier::PushClientObserver implementation.
-  virtual void OnNotificationStateChange(
-      bool notifications_enabled) OVERRIDE;
+  virtual void OnPushClientStateChange(
+      notifier::PushClientState push_client_state) OVERRIDE;
   virtual void OnIncomingNotification(
       const notifier::Notification& notification) OVERRIDE;
 
@@ -500,10 +500,10 @@ void CloudPrintProxyBackend::Core::NotifyUnregisterPrinters(
   backend_->frontend_->OnUnregisterPrinters(auth_token, printer_ids);
 }
 
-void CloudPrintProxyBackend::Core::OnNotificationStateChange(
-    bool notification_enabled) {
+void CloudPrintProxyBackend::Core::OnPushClientStateChange(
+    notifier::PushClientState push_client_state) {
   DCHECK(MessageLoop::current() == backend_->core_thread_.message_loop());
-  notifications_enabled_ = notification_enabled;
+  notifications_enabled_ = (push_client_state == notifier::NOTIFICATIONS_ON);
   if (notifications_enabled_) {
     notifications_enabled_since_ = base::TimeTicks::Now();
     VLOG(1) << "Notifications for connector " << proxy_id_