[Sync] Propagate XMPP auth errors to SyncNotifierObservers

sync/notifier/sync_notifier_state.h

+// Copyright (c) 2012 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 SYNC_NOTIFIER_SYNC_NOTIFIER_STATE_H_
+#define SYNC_NOTIFIER_SYNC_NOTIFIER_STATE_H_
+#pragma once
+
+#include "jingle/notifier/listener/push_client_observer.h"
+
+namespace sync_notifier {
+
+enum SyncNotifierState {
+  // 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
+};
+
+const char* SyncNotifierStateToString(
+    SyncNotifierState sync_notifier_state);
+
+SyncNotifierState PushClientStateToSyncNotifierState(
+    notifier::PushClientState push_client_state);
+
+}  // namespace sync_notifier
+
+#endif  // SYNC_NOTIFIER_SYNC_NOTIFIER_STATE_H_