make new syncer thread the default.

chrome/browser/sync/engine/nudge_source.h

-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// 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 CHROME_BROWSER_SYNC_ENGINE_NUDGE_SOURCE_H_
 #define CHROME_BROWSER_SYNC_ENGINE_NUDGE_SOURCE_H_
 #pragma once
 
 namespace browser_sync {
 
-namespace s3 {
-
 enum NudgeSource {
   NUDGE_SOURCE_UNKNOWN = 0,
   // We received an invalidation message and are nudging to check for updates.
   NUDGE_SOURCE_NOTIFICATION,
   // A local change occurred (e.g. bookmark moved).
   NUDGE_SOURCE_LOCAL,
   // A previous sync cycle did not fully complete (e.g. HTTP error).
   NUDGE_SOURCE_CONTINUATION,
 };
 
-}  // namespace s3
 }  // namespace browser_sync
 
 #endif  // CHROME_BROWSER_SYNC_ENGINE_NUDGE_SOURCE_H_