[Sync] Rename csync namespace to syncer

sync/notifier/notifications_disabled_reason.cc

 // 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.
 
 #include "sync/notifier/notifications_disabled_reason.h"
 
 #include "base/logging.h"
 
-namespace csync {
+namespace syncer {
 
 const char* NotificationsDisabledReasonToString(
     NotificationsDisabledReason reason) {
   switch (reason) {
     case NO_NOTIFICATION_ERROR:
       return "NO_NOTIFICATION_ERROR";
     case TRANSIENT_NOTIFICATION_ERROR:
       return "TRANSIENT_NOTIFICATION_ERROR";
     case NOTIFICATION_CREDENTIALS_REJECTED:
       return "NOTIFICATION_CREDENTIALS_REJECTED";
@@ skipping 11 matching lines @@
     case notifier::TRANSIENT_NOTIFICATION_ERROR:
       return TRANSIENT_NOTIFICATION_ERROR;
     case notifier::NOTIFICATION_CREDENTIALS_REJECTED:
       return NOTIFICATION_CREDENTIALS_REJECTED;
     default:
       NOTREACHED();
       return TRANSIENT_NOTIFICATION_ERROR;
   }
 }
 
-}  // sync_notifier
+}  // namespace syncer