[inspector] Refactor protocol-test.js

test/inspector/console/let-const-with-api.js

Index: test/inspector/console/let-const-with-api.js
diff --git a/test/inspector/console/let-const-with-api.js b/test/inspector/console/let-const-with-api.js
index 0280fe11747a2049cc4160428df7107a331b0c4c..b51572d08ee3da7cff2b8840286fae627136ae89 100644
--- a/test/inspector/console/let-const-with-api.js
+++ b/test/inspector/console/let-const-with-api.js
@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+let {session, contextGroup, Protocol} = InspectorTest.start('Tests how let and const interact with command line api');
+
 Protocol.Runtime.evaluate({ expression: "let a = 42;" }).then(step2);
 
 function step2(response)