[inspector] Refactor protocol-test.js

test/inspector/runtime/length-or-size-description.js

Index: test/inspector/runtime/length-or-size-description.js
diff --git a/test/inspector/runtime/length-or-size-description.js b/test/inspector/runtime/length-or-size-description.js
index ec3ed6d263a8fa20e933f42839a5167e29d740c0..0006bfb61dc2334b1f5f04297ac83e793ca612e8 100644
--- a/test/inspector/runtime/length-or-size-description.js
+++ b/test/inspector/runtime/length-or-size-description.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("Test that descriptions for arrays, maps, and sets include the correct length or size.")
+let {session, contextGroup, Protocol} = InspectorTest.start("Test that descriptions for arrays, maps, and sets include the correct length or size.")
 
-InspectorTest.setupInjectedScriptEnvironment();
+contextGroup.setupInjectedScriptEnvironment();
 
 Promise.all([
   testExpression("new Set()"),