[inspector] Refactor protocol-test.js

test/inspector/debugger/async-stack-for-promise.js

Index: test/inspector/debugger/async-stack-for-promise.js
diff --git a/test/inspector/debugger/async-stack-for-promise.js b/test/inspector/debugger/async-stack-for-promise.js
index 9865d7a76760298b7fde738e09579eb79d861cc1..198c971e128014b5f9b40ae8866f35b4845ef875 100644
--- a/test/inspector/debugger/async-stack-for-promise.js
+++ b/test/inspector/debugger/async-stack-for-promise.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 async chains for promises are correct.');
+let {session, contextGroup, Protocol} = InspectorTest.start('Checks that async chains for promises are correct.');
 
-InspectorTest.addScript(`
+contextGroup.addScript(`
 function foo1() {
   debugger;
 }
@@ -219,10 +219,10 @@ function reject() {
 
 //# sourceURL=test.js`, 7, 26);
 
-InspectorTest.setupScriptMap();
+session.setupScriptMap();
 Protocol.Debugger.onPaused(message => {
-  InspectorTest.logCallFrames(message.params.callFrames);
-  InspectorTest.logAsyncStackTrace(message.params.asyncStackTrace);
+  session.logCallFrames(message.params.callFrames);
+  session.logAsyncStackTrace(message.params.asyncStackTrace);
   InspectorTest.log('');
   Protocol.Debugger.resume();
 });