Switch to standard integer types in sync/.

sync/engine/commit_contribution.h

 // Copyright 2014 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_ENGINE_COMMIT_CONTRIBUTION_H_
 #define SYNC_ENGINE_COMMIT_CONTRIBUTION_H_
 
+#include <stddef.h>
+
 #include "sync/base/sync_export.h"
 #include "sync/internal_api/public/util/syncer_error.h"
 #include "sync/protocol/sync.pb.h"
 #include "sync/sessions/status_controller.h"
 
 namespace syncer {
 
 namespace sessions {
 class StatusController;
 }  // namespace sessions
@@ skipping 27 matching lines @@
   // before destruction.
   virtual void CleanUp() = 0;
 
   // Returns the number of entries included in this contribution.
   virtual size_t GetNumEntries() const = 0;
 };
 
 }  // namespace syncer
 
 #endif  // SYNC_ENGINE_COMMIT_CONTRIBUTION_H_