Switch to standard integer types in sync/.

sync/test/callback_counter.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_TEST_CALLBACK_COUNTER_H_
 #define SYNC_TEST_CALLBACK_COUNTER_H_
 
+#include "base/macros.h"
+
 namespace syncer {
 
 // Helper class to track how many times a callback is triggered.
 class CallbackCounter {
  public:
   CallbackCounter() { Reset(); }
   ~CallbackCounter() {}
 
   void Reset() { times_called_ = 0; }
   void Callback() { ++times_called_; }
   int times_called() const { return times_called_; }
 
  private:
   int times_called_;
 
   DISALLOW_COPY_AND_ASSIGN(CallbackCounter);
 };
 
 }  // namespace syncer
 
 #endif  // SYNC_TEST_CALLBACK_COUNTER_H_