[Sync] Propagate XMPP auth errors to SyncNotifierObservers

jingle/notifier/listener/push_client_observer.h

Index: jingle/notifier/listener/push_client_observer.h
diff --git a/jingle/notifier/listener/push_client_observer.h b/jingle/notifier/listener/push_client_observer.h
index 0fe7d467295746bca2689611847c06a7cd4575eb..2aed2e24f6e33c3bc48b74d5bdf20484c0791071 100644
--- a/jingle/notifier/listener/push_client_observer.h
+++ b/jingle/notifier/listener/push_client_observer.h
@@ -9,6 +9,17 @@
 
 namespace notifier {
 
+enum PushClientState {
+  // Notifications can be sent and received freely.
+  NOTIFICATIONS_ON,
+  // No notifications can be sent or received.  This is a transient state.
+  NOTIFICATIONS_OFF,
+  // Credentials were rejected, so no notifications can be sent or
+  // received.  This state persists until a successful connection with
+  // updated auth credentials.
+  CREDENTIALS_REJECTED
+};
+
 // A PushClientObserver is notified whenever an incoming notification
 // is received or when the state of the push client changes.
 class PushClientObserver {
@@ -16,11 +27,9 @@ class PushClientObserver {
   virtual ~PushClientObserver();
 
  public:
-  // Called when the state of the push client changes.  If
-  // |notifications_enabled| is true, that means notifications can be
-  // sent and received freely.  If it is false, that means no
-  // notifications can be sent or received.
-  virtual void OnNotificationStateChange(bool notifications_enabled) = 0;
+  // Called when the state of the push client changes.
+  virtual void OnPushClientStateChange(
+      PushClientState push_client_state) = 0;
 
   // Called when a notification is received.  The details of the
   // notification are in |notification|.