[Sync] Move sync/{internal_api,syncable} into syncer namespace

sync/syncable/write_transaction.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/syncable/write_transaction.h"
 
 #include "sync/syncable/directory.h"
 #include "sync/syncable/directory_change_delegate.h"
 #include "sync/syncable/transaction_observer.h"
 #include "sync/syncable/write_transaction_info.h"
 
+namespace syncer {
 namespace syncable {
 
 WriteTransaction::WriteTransaction(const tracked_objects::Location& location,
                                    WriterTag writer, Directory* directory)
     : BaseTransaction(location, "WriteTransaction", writer, directory) {
   Lock();
 }
 
 void WriteTransaction::SaveOriginal(const EntryKernel* entry) {
   if (!entry) {
@@ skipping 110 matching lines @@
     ENUM_CASE(PURGE_ENTRIES);
     ENUM_CASE(SYNCAPI);
   };
   NOTREACHED();
   return "";
 }
 
 #undef ENUM_CASE
 
 }  // namespace syncable
+}  // namespace syncer