Switch to standard integer types in base/test/.

base/test/gtest_util.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 "base/test/gtest_util.h"
 
+#include <stddef.h>
+
 #include "base/files/file_path.h"
 #include "base/json/json_file_value_serializer.h"
 #include "base/values.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace base {
 
 TestIdentifier::TestIdentifier() {
 }
 
@@ skipping 73 matching lines @@
       return false;
 
     result.push_back(test_data);
   }
 
   output->swap(result);
   return true;
 }
 
 }  // namespace base