[inspector] Refactor protocol-test.js

test/inspector/runtime/console-time-end-format.js

Index: test/inspector/runtime/console-time-end-format.js
diff --git a/test/inspector/runtime/console-time-end-format.js b/test/inspector/runtime/console-time-end-format.js
index c87f672e2c558eea136f6613d2a0d40ede49ac91..7e4ff788b4a61b7fb61805717b8b2691f5069cb8 100644
--- a/test/inspector/runtime/console-time-end-format.js
+++ b/test/inspector/runtime/console-time-end-format.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('Checks format of console.timeEnd output');
+let {session, contextGroup, Protocol} = InspectorTest.start('Checks format of console.timeEnd output');
 
 Protocol.Runtime.enable();
 Protocol.Runtime.onConsoleAPICalled(message => {