Switch to standard integer types in chrome/browser/, part 3 of 4.

chrome/browser/profiles/profile_metrics_mac.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 "chrome/browser/profiles/profile_metrics.h"
 
+#include <stddef.h>
+#include <stdint.h>
+
 #include "base/numerics/safe_conversions.h"
 #include "chrome/browser/mac/keystone_glue.h"
 
 void ProfileMetrics::UpdateReportedOSProfileStatistics(
     size_t active, size_t signedin) {
   if (base::IsValueInRangeForNumericType<uint32_t>(active) &&
       base::IsValueInRangeForNumericType<uint32_t>(signedin)) {
     [[KeystoneGlue defaultKeystoneGlue]
         updateProfileCountsWithNumProfiles:active
                        numSignedInProfiles:signedin];
   }
 }