[inspector] Refactor protocol-test.js

test/inspector/runtime/call-function-on-async.js

Index: test/inspector/runtime/call-function-on-async.js
diff --git a/test/inspector/runtime/call-function-on-async.js b/test/inspector/runtime/call-function-on-async.js
index e6cf5f9edff5f3932ee7f11cdc69535118a566bc..cce28565c14a7153f18d2dafc91725a28c1b6d68 100644
--- a/test/inspector/runtime/call-function-on-async.js
+++ b/test/inspector/runtime/call-function-on-async.js
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-InspectorTest.log("Tests that Runtime.callFunctionOn works with awaitPromise flag.");
+let {session, contextGroup, Protocol} = InspectorTest.start("Tests that Runtime.callFunctionOn works with awaitPromise flag.");
 
 InspectorTest.runTestSuite([
   function testArguments(next)