Removes reference counting from syncable::Directory::Kernel as it is no longer required because syn…

sync/syncable/directory.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_DIRECTORY_H_
 #define SYNC_SYNCABLE_DIRECTORY_H_
 #pragma once
 
 #include <set>
 #include <string>
@@ skipping 479 matching lines @@
   struct Kernel {
     // |delegate| must not be NULL.  |transaction_observer| must be
     // initialized.
     Kernel(const std::string& name, const KernelLoadInfo& info,
            DirectoryChangeDelegate* delegate,
            const browser_sync::WeakHandle<TransactionObserver>&
                transaction_observer);
 
     ~Kernel();
 
-    void AddRef();  // For convenience.
-    void Release();
-
-    // TODO(timsteele): audit use of the member and remove if possible
-    volatile base::subtle::AtomicWord refcount;
-
     // Implements ReadTransaction / WriteTransaction using a simple lock.
     base::Lock transaction_mutex;
 
     // Protected by transaction_mutex.  Used by WriteTransactions.
     int64 next_write_transaction_id;
 
     // The name of this directory.
     std::string const name;
 
     // Protects all members below.
@@ skipping 97 matching lines @@
 
   browser_sync::UnrecoverableErrorHandler* const unrecoverable_error_handler_;
   const browser_sync::ReportUnrecoverableErrorFunction
       report_unrecoverable_error_function_;
   bool unrecoverable_error_set_;
 };
 
 } // namespace syncable
 
 #endif // SYNC_SYNCABLE_DIRECTORY_H_