Switch to standard integer types in ios/.

ios/chrome/browser/net/image_fetcher.mm

 // Copyright 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.
 
 #import "ios/chrome/browser/net/image_fetcher.h"
 
 #import <Foundation/Foundation.h>
+#include <stddef.h>
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/mac/scoped_nsobject.h"
 #include "base/task_runner.h"
 #include "components/webp_transcode/webp_decoder.h"
 #include "ios/web/public/web_thread.h"
 #include "net/base/load_flags.h"
 #include "net/http/http_response_headers.h"
 #include "net/url_request/url_fetcher.h"
@@ skipping 150 matching lines @@
     NSData* data) {
   (callback.get())(url, http_response_code, data);
 }
 
 void ImageFetcher::SetRequestContextGetter(
     const scoped_refptr<net::URLRequestContextGetter>& request_context_getter) {
   request_context_getter_ = request_context_getter;
 }
 
 }  // namespace image_fetcher