[inspector] Refactor protocol-test.js

test/inspector/runtime/console-messages-limits.js

Index: test/inspector/runtime/console-messages-limits.js
diff --git a/test/inspector/runtime/console-messages-limits.js b/test/inspector/runtime/console-messages-limits.js
index a6a8ccefaef909bd68726a04f7e77ffa1a518b17..4a8159072ee34b2fbc163f660411fc832d70d56c 100644
--- a/test/inspector/runtime/console-messages-limits.js
+++ b/test/inspector/runtime/console-messages-limits.js
@@ -2,9 +2,9 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-InspectorTest.log('Checks that console message storage doesn\'t exceed limits');
+let {session, contextGroup, Protocol} = InspectorTest.start('Checks that console message storage doesn\'t exceed limits');
 
-InspectorTest.addScript(`
+contextGroup.addScript(`
 function generateEmptyMessages(n) {
   for (var i = 0; i < n; ++i) {
     console.log('');