Switch to standard integer types in mojo/.

mojo/services/test_service/test_request_tracker_impl.cc

 // Copyright 2014 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 "mojo/services/test_service/test_request_tracker_impl.h"
 
+#include <stddef.h>
+#include <stdint.h>
+
 #include <utility>
 
 namespace mojo {
 namespace test {
 
 TrackingContext::TrackingContext() : next_id(1) {
 }
 
 TrackingContext::~TrackingContext() {
 }
@@ skipping 51 matching lines @@
       mean_health_numerator += it2->health;
     }
     report->mean_health = mean_health_numerator / num_samples;
     reports.push_back(std::move(report));
   }
   callback.Run(std::move(reports));
 }
 
 }  // namespace test
 }  // namespace mojo