[Sync] Move //components/sync to the syncer namespace.

components/sync/engine/commit_queue.h

 // Copyright 2014 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 COMPONENTS_SYNC_ENGINE_COMMIT_QUEUE_H_
 #define COMPONENTS_SYNC_ENGINE_COMMIT_QUEUE_H_
 
 #include "components/sync/core/non_blocking_sync_common.h"
 
-namespace syncer_v2 {
+namespace syncer {
 
 // Interface used by a synced data type to issue requests to the sync backend.
 class CommitQueue {
  public:
   CommitQueue();
   virtual ~CommitQueue();
 
   // Entry point for the ModelTypeProcessor to send commit requests.
   virtual void EnqueueForCommit(const CommitRequestDataList& list) = 0;
 };
 
-}  // namespace syncer_v2
+}  // namespace syncer
 
 #endif  // COMPONENTS_SYNC_ENGINE_COMMIT_QUEUE_H_