Switch to standard integer types in ios/.

ios/chrome/common/app_group/app_group_metrics_mainapp.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.
 
 #include "ios/chrome/common/app_group/app_group_metrics_mainapp.h"
 
+#include <stdint.h>
+
 #include "base/logging.h"
 #include "base/mac/scoped_nsobject.h"
 #include "ios/chrome/common/app_group/app_group_constants.h"
 #include "ios/chrome/common/app_group/app_group_metrics.h"
 
 namespace app_group {
 
 namespace main_app {
 
 void ProcessPendingLogs(
@@ skipping 15 matching lines @@
         NSData* log_content = [file_manager contentsAtPath:[file_url path]];
         callback.get()(log_content);
       }
       [file_manager removeItemAtURL:file_url error:nil];
     }
   }
 }
 
 void EnableMetrics(NSString* client_id,
                    NSString* brand_code,
-                   int64 install_date,
-                   int64 enable_metrics_date) {
+                   int64_t install_date,
+                   int64_t enable_metrics_date) {
   base::scoped_nsobject<NSUserDefaults> shared_defaults(
       [[NSUserDefaults alloc] initWithSuiteName:ApplicationGroup()]);
   [shared_defaults setObject:client_id forKey:@(kChromeAppClientID)];
 
   [shared_defaults
       setObject:[NSString stringWithFormat:@"%lld", enable_metrics_date]
          forKey:@(kUserMetricsEnabledDate)];
 
   [shared_defaults setObject:[NSString stringWithFormat:@"%lld", install_date]
                       forKey:@(kInstallDate)];
 
   [shared_defaults setObject:brand_code forKey:@(kBrandCode)];
 }
 
 void DisableMetrics() {
   base::scoped_nsobject<NSUserDefaults> shared_defaults(
       [[NSUserDefaults alloc] initWithSuiteName:ApplicationGroup()]);
   [shared_defaults removeObjectForKey:@(kChromeAppClientID)];
 }
 
 }  // namespace main_app
 
 }  // namespace app_group