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

sync/syncable/directory.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/directory.h"
 
 #include "base/debug/trace_event.h"
 #include "base/perftimer.h"
 #include "base/stl_util.h"
 #include "base/string_number_conversions.h"
 #include "sync/internal_api/public/util/unrecoverable_error_handler.h"
 #include "sync/syncable/base_transaction.h"
 #include "sync/syncable/entry.h"
 #include "sync/syncable/entry_kernel.h"
 #include "sync/syncable/in_memory_directory_backing_store.h"
 #include "sync/syncable/on_disk_directory_backing_store.h"
 #include "sync/syncable/read_transaction.h"
 #include "sync/syncable/scoped_index_updater.h"
 #include "sync/syncable/syncable-inl.h"
 #include "sync/syncable/syncable_changes_version.h"
 #include "sync/syncable/syncable_util.h"
 #include "sync/syncable/write_transaction.h"
 
-using syncer::Encryptor;
-using syncer::ReportUnrecoverableErrorFunction;
-using syncer::UnrecoverableErrorHandler;
 using std::string;
 
+namespace syncer {
 namespace syncable {
 
 namespace {
 // Max number of milliseconds to spend checking syncable entry invariants
 const int kInvariantCheckMaxMs = 50;
 
 // Helper function to add an item to the index, if it ought to be added.
 template<typename Indexer>
 void InitializeIndexEntry(EntryKernel* entry,
                           typename Index<Indexer>::Set* index) {
@@ skipping 1272 matching lines @@
     }
   }
   // There were no children in the linked list.
   return NULL;
 }
 
 ScopedKernelLock::ScopedKernelLock(const Directory* dir)
   :  scoped_lock_(dir->kernel_->mutex), dir_(const_cast<Directory*>(dir)) {
 }
 
-}
+}  // namespace syncable
+}  // namespace syncer