[Sync] Rename csync namespace to syncer

sync/internal_api/public/read_transaction.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_INTERNAL_API_PUBLIC_READ_TRANSACTION_H_
 #define SYNC_INTERNAL_API_PUBLIC_READ_TRANSACTION_H_
 
 #include "base/compiler_specific.h"
 #include "sync/internal_api/public/base_transaction.h"
 
 namespace tracked_objects {
 class Location;
 }  // namespace tracked_objects
 
-namespace csync {
+namespace syncer {
 
 struct UserShare;
 
 // Sync API's ReadTransaction is a read-only BaseTransaction.  It wraps
 // a syncable::ReadTransaction.
 class ReadTransaction : public BaseTransaction {
  public:
   // Start a new read-only transaction on the specified repository.
   ReadTransaction(const tracked_objects::Location& from_here,
                   UserShare* share);
 
   // Resume the middle of a transaction. Will not close transaction.
   ReadTransaction(UserShare* share, syncable::BaseTransaction* trans);
 
   virtual ~ReadTransaction();
 
   // BaseTransaction override.
   virtual syncable::BaseTransaction* GetWrappedTrans() const OVERRIDE;
  private:
   void* operator new(size_t size);  // Transaction is meant for stack use only.
 
   // The underlying syncable object which this class wraps.
   syncable::BaseTransaction* transaction_;
   bool close_transaction_;
 
   DISALLOW_COPY_AND_ASSIGN(ReadTransaction);
 };
 
-} // namespace csync
+}  // namespace syncer
 
 #endif  // SYNC_INTERNAL_API_PUBLIC_READ_TRANSACTION_H_