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

components/url_matcher/url_matcher_helpers.cc

 // Copyright 2013 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/url_matcher/url_matcher_helpers.h"
 
+#include <stddef.h>
+
 #include "base/values.h"
 
 namespace url_matcher {
 namespace url_matcher_helpers {
 
 // Converts a ValueList |value| of strings into a vector. Returns true if
 // successful.
 bool GetAsStringVector(const base::Value* value,
                        std::vector<std::string>* out) {
   const base::ListValue* value_as_list = 0;
   if (!value->GetAsList(&value_as_list))
     return false;
 
   size_t number_types = value_as_list->GetSize();
   for (size_t i = 0; i < number_types; ++i) {
     std::string item;
     if (!value_as_list->GetString(i, &item))
       return false;
     out->push_back(item);
   }
   return true;
 }
 
 }  // namespace url_matcher_helpers
 }  // namespace url_matcher