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

chrome/browser/engagement/site_engagement_service.cc

 // 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/engagement/site_engagement_service.h"
 
+#include <stddef.h>
+
 #include <algorithm>
 #include <cmath>
 #include <vector>
 
 #include "base/command_line.h"
 #include "base/metrics/field_trial.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
 #include "base/time/clock.h"
 #include "base/time/default_clock.h"
@@ skipping 529 matching lines @@
       HostContentSettingsMapFactory::GetForProfile(profile_);
   for (const auto& origin_to_count : origin_counts) {
     if (origin_to_count.second != 0)
       continue;
 
     settings_map->SetWebsiteSettingDefaultScope(
         origin_to_count.first, GURL(), CONTENT_SETTINGS_TYPE_SITE_ENGAGEMENT,
         std::string(), nullptr);
   }
 }