[inspector] Refactor protocol-test.js

test/inspector/debugger/async-instrumentation.js

 // Copyright 2016 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-InspectorTest.log('Checks async instrumentation enabled in the middle.');
+let {session, contextGroup, Protocol} = InspectorTest.start('Checks async instrumentation enabled in the middle.');
 
-InspectorTest.addScript(`
+contextGroup.addScript(`
 function foo() {
   // asyncTaskStarted
   debugger;
   // asyncTaskFinished
   debugger;
 }
 
 function test() {
   debugger;
   var resolve1;
   var p1 = new Promise(resolve => resolve1 = resolve);
   var p2 = p1.then(foo);
   resolve1(); // asyncTaskScheduled
   debugger;
   return p2;
 }
 
 //# sourceURL=test.js`, 7, 26);
 
-InspectorTest.setupScriptMap();
+session.setupScriptMap();
 Protocol.Debugger.onPaused(message => {
   if (enableOnPause-- === 0)
     Protocol.Debugger.setAsyncCallStackDepth({ maxDepth: 128 });
-  InspectorTest.logCallFrames(message.params.callFrames);
+  session.logCallFrames(message.params.callFrames);
   var asyncStackTrace = message.params.asyncStackTrace;
   while (asyncStackTrace) {
     InspectorTest.log(`-- ${asyncStackTrace.description} --`);
-    InspectorTest.logCallFrames(asyncStackTrace.callFrames);
+    session.logCallFrames(asyncStackTrace.callFrames);
     asyncStackTrace = asyncStackTrace.parent;
   }
   InspectorTest.log('');
   Protocol.Debugger.resume();
 });
 
 Protocol.Debugger.enable();
 var enableOnPause = 0;
 InspectorTest.runTestSuite([
   function beforeAsyncTaskScheduled(next) {
@@ skipping 13 matching lines @@
   },
 
   function afterAsyncTaskStarted(next) {
     enableOnPause = 3;
     Protocol.Runtime.evaluate({ expression: 'test()//# sourceURL=expr1.js',
         awaitPromise: true })
       .then(() => Protocol.Debugger.setAsyncCallStackDepth({ maxDepth: 0 }))
       .then(next);
   }
 ]);