make new syncer thread the default.

content/common/notification_type.h

 // Copyright (c) 2011 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 CONTENT_COMMON_NOTIFICATION_TYPE_H_
 #define CONTENT_COMMON_NOTIFICATION_TYPE_H_
 #pragma once
 
 // This file describes various types used to describe and filter notifications
 // that pass through the NotificationService.
@@ skipping 1097 matching lines @@
     // details are None.
     DESKTOP_NOTIFICATION_SETTINGS_CHANGED,
 
     // Sent when the geolocation settings change. The source is the
     // GeolocationContentSettingsMap object, the details are
     // ContentSettingsNotificationsDetails.
     GEOLOCATION_SETTINGS_CHANGED,
 
     // Sync --------------------------------------------------------------------
 
-    // Sent when the sync backend has been paused.
-    SYNC_PAUSED,
-
-    // Sent when the sync backend has been resumed.
-    SYNC_RESUMED,
+    // Sent when the syncer is blocked configuring.
+    SYNC_CONFIGURE_BLOCKED,
 
     // The sync service has started the configuration process.
     SYNC_CONFIGURE_START,
 
     // The sync service is finished the configuration process.
     SYNC_CONFIGURE_DONE,
 
     // The session service has been saved.  This notification type is only sent
     // if there were new SessionService commands to save, and not for no-op save
     // operations.
@@ skipping 210 matching lines @@
 };
 
 inline bool operator==(NotificationType::Type a, NotificationType b) {
   return a == b.value;
 }
 inline bool operator!=(NotificationType::Type a, NotificationType b) {
   return a != b.value;
 }
 
 #endif  // CONTENT_COMMON_NOTIFICATION_TYPE_H_