Switch to standard integer types in chrome/browser/, part 2 of 4.

chrome/browser/net/utility_process_mojo_proxy_resolver_factory.h

 // Copyright 2015 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_NET_UTILITY_PROCESS_MOJO_PROXY_RESOLVER_FACTORY_H_
 #define CHROME_BROWSER_NET_UTILITY_PROCESS_MOJO_PROXY_RESOLVER_FACTORY_H_
 
+#include <stddef.h>
+
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "base/threading/thread_checker.h"
 #include "base/timer/timer.h"
 #include "net/proxy/mojo_proxy_resolver_factory.h"
 
 namespace content {
 class UtilityProcessHost;
 }
 namespace base {
@@ skipping 42 matching lines @@
   size_t num_proxy_resolvers_ = 0;
 
   base::OneShotTimer idle_timer_;
 
   base::ThreadChecker thread_checker_;
 
   DISALLOW_COPY_AND_ASSIGN(UtilityProcessMojoProxyResolverFactory);
 };
 
 #endif  // CHROME_BROWSER_NET_UTILITY_PROCESS_MOJO_PROXY_RESOLVER_FACTORY_H_