Switch to standard integer types in chrome/browser/, part 4 of 4.

chrome/browser/sync_file_system/drive_backend/callback_tracker.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 CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_CALLBACK_TRACKER_H_
 #define CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_CALLBACK_TRACKER_H_
 
 #include <map>
 
 #include "base/bind.h"
 #include "base/callback_forward.h"
+#include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "chrome/browser/sync_file_system/drive_backend/callback_tracker_internal.h"
 
 namespace sync_file_system {
 namespace drive_backend {
 
 // A helper class to ensure one-shot callback to be called exactly once.
 //
 // Usage:
 //   class Foo {
@@ skipping 41 matching lines @@
 
   AbortClosureByHelper helpers_;  // Owns AbortHelpers.
 
   DISALLOW_COPY_AND_ASSIGN(CallbackTracker);
 };
 
 }  // namespace drive_backend
 }  // namespace sync_file_system
 
 #endif  // CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_CALLBACK_TRACKER_H_