message: Update filter_chain_benchmark_test.cc
diff: @@ -166,7 +166,7 @@ const char YamlSingleDstPortBottom[] = R"EOF(
  class FilterChainBenchmarkFixture : public benchmark::Fixture {
  public:
  - void SetUp(const ::benchmark::State& state) override {
  + void SetUp(::benchmark::State& state) override {
  int64_t input_size = state.range(0);
  std::vector<std::string> port_chains;
  port_chains.reserve(input_size);
  