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

components/update_client/background_downloader_win.cc

 // 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.
 
 #include "components/update_client/background_downloader_win.h"
 
 #include <atlbase.h>
 #include <atlcom.h>
+#include <stddef.h>
 
 #include <stdint.h>
 #include <functional>
 #include <iomanip>
 #include <limits>
 #include <vector>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/files/file_util.h"
@@ skipping 851 matching lines @@
 
   for (auto cookie : cookies) {
     hr = git->RevokeInterfaceFromGlobal(cookie);
     DCHECK(SUCCEEDED(hr));
   }
 
   return S_OK;
 }
 
 }  // namespace update_client