Improve certificate tests that hit google.com.

runtime/vm/benchmark_test.cc

Index: runtime/vm/benchmark_test.cc
diff --git a/runtime/vm/benchmark_test.cc b/runtime/vm/benchmark_test.cc
index ec82fc9e171171529ffb2913cc02c5652b9a4d81..888efb46231d6d2e92141b8d27e3fc98f3b1a0b8 100644
--- a/runtime/vm/benchmark_test.cc
+++ b/runtime/vm/benchmark_test.cc
@@ -465,11 +465,10 @@ BENCHMARK(CreateMirrorSystem) {
       "}\n";
 
   Dart_Handle lib = TestCase::LoadTestScript(kScriptChars, NULL);
-  Dart_Handle args[0];
 
   Timer timer(true, "currentMirrorSystem() benchmark");
   timer.Start();
-  Dart_Invoke(lib, NewString("benchmark"), 0, args);
+  Dart_Invoke(lib, NewString("benchmark"), 0, NULL);
   timer.Stop();
   int64_t elapsed_time = timer.TotalElapsedTime();
   benchmark->set_score(elapsed_time);