[Sync] Rename csync namespace to syncer

sync/syncable/mutable_entry.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_SYNCABLE_MUTABLE_ENTRY_H_
 #define SYNC_SYNCABLE_MUTABLE_ENTRY_H_
 #pragma once
 
 #include "sync/syncable/entry.h"
 #include "sync/syncable/metahandle_set.h"
 
-namespace csync {
+namespace syncer {
 class WriteNode;
 }
 
 namespace syncable {
 
 class WriteTransaction;
 
 enum Create {
   CREATE
 };
@@ skipping 59 matching lines @@
   bool Put(BitTemp field, bool value);
 
  protected:
   syncable::MetahandleSet* GetDirtyIndexHelper();
 
   bool PutIsDel(bool value);
 
  private:
   friend class Directory;
   friend class WriteTransaction;
-  friend class csync::WriteNode;
+  friend class syncer::WriteNode;
 
   // Don't allow creation on heap, except by sync API wrappers.
   void* operator new(size_t size) { return (::operator new)(size); }
 
   bool PutUniqueClientTag(const std::string& value);
 
   // Adjusts the successor and predecessor entries so that they no longer
   // refer to this entry.
   bool UnlinkFromOrder();
 
   // Kind of redundant. We should reduce the number of pointers
   // floating around if at all possible. Could we store this in Directory?
   // Scope: Set on construction, never changed after that.
   WriteTransaction* const write_transaction_;
 
  protected:
   MutableEntry();
 
   DISALLOW_COPY_AND_ASSIGN(MutableEntry);
 };
 
 // This function sets only the flags needed to get this entry to sync.
 bool MarkForSyncing(syncable::MutableEntry* e);
 
-} // namespace syncable
+}  // namespace syncable
 
 #endif  // SYNC_SYNCABLE_MUTABLE_ENTRY_H_