Switch to standard integer types in components/, part 4 of 4.

components/variations/variations_seed_simulator.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 "components/variations/variations_seed_simulator.h"
 
+#include <stddef.h>
+
 #include <map>
 
 #include "base/metrics/field_trial.h"
 #include "components/variations/processed_study.h"
 #include "components/variations/proto/study.pb.h"
 #include "components/variations/study_filtering.h"
 #include "components/variations/variations_associated_data.h"
 
 namespace variations {
 
@@ skipping 230 matching lines @@
     return ConvertExperimentTypeToChangeType(experiment->type());
   }
 
   // Current group exists in the study - check whether its params changed.
   if (!VariationParamsAreEqual(study, *experiment))
     return ConvertExperimentTypeToChangeType(experiment->type());
   return NO_CHANGE;
 }
 
 }  // namespace variations