Switch to standard integer types in ios/.

ios/web/web_state/crw_pass_kit_downloader.mm

 // 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.
 
 #import "ios/web/web_state/crw_pass_kit_downloader.h"
 
 #import "base/ios/weak_nsobject.h"
 #include "base/mac/scoped_block.h"
+#include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/metrics/histogram.h"
 #include "base/strings/sys_string_conversions.h"
 #import "ios/web/crw_network_activity_indicator_manager.h"
 #include "net/http/http_response_headers.h"
 #include "net/url_request/url_fetcher.h"
 #include "net/url_request/url_fetcher_delegate.h"
 #include "net/url_request/url_request_context_getter.h"
 
 using net::URLFetcher;
@@ skipping 173 matching lines @@
       stringWithFormat:@"PassKitDownloader.NetworkActivityIndicatorKey.%d",
                        _passKitDownloaderID];
 }
 
 - (void)reportUMAPassKitResult:(DownloadPassKitResult)result {
   UMA_HISTOGRAM_ENUMERATION(kUMADownloadPassKitResult, result,
                             DOWNLOAD_PASS_KIT_RESULT_COUNT);
 }
 
 @end