Switch to standard integer types in extensions/.

extensions/common/url_pattern_set_unittest.cc

 // Copyright (c) 2012 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 "extensions/common/url_pattern_set.h"
 
+#include <stddef.h>
+
 #include <sstream>
 
 #include "base/values.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "url/gurl.h"
 
 namespace extensions {
 
 namespace {
 
@@ skipping 451 matching lines @@
   const auto begin = string_vector->begin();
   const auto end = string_vector->end();
 
   auto it = std::find(begin, end, "https://google.com/");
   EXPECT_NE(it, end);
   it = std::find(begin, end, "https://yahoo.com/");
   EXPECT_NE(it, end);
 }
 
 }  // namespace extensions