[inspector] Refactor protocol-test.js

test/inspector/debugger/schedule-step-into-async.js

 // Copyright 2017 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 Debugger.scheduleStepIntoAsync.');
+let {session, contextGroup, Protocol} = InspectorTest.start('Checks Debugger.scheduleStepIntoAsync.');
 
-InspectorTest.addScript(`
+contextGroup.addScript(`
 function testNoScheduledTask() {
   debugger;
   return 42;
 }
 
 function testSimple() {
   debugger;
   Promise.resolve().then(v => v * 2);
 }
 
@@ skipping 22 matching lines @@
   debugger;
   Promise.all([ Promise.resolve(), Promise.resolve() ]).then(v => v * 2);
 }
 
 function testBlackboxedCreatePromise() {
   debugger;
   createPromise().then(v => v * 2);
 }
 //# sourceURL=test.js`);
 
-InspectorTest.addScript(`
+contextGroup.addScript(`
 
 function createPromise() {
   return Promise.resolve().then(v => v * 3).then(v => v * 4);
 }
 
 //# sourceURL=framework.js`)
 
-InspectorTest.setupScriptMap();
+session.setupScriptMap();
 
 Protocol.Debugger.enable();
 InspectorTest.runAsyncTestSuite([
   async function testScheduleErrors() {
     Protocol.Runtime.evaluate({ expression: 'testNoScheduledTask()' });
     await waitPauseAndDumpLocation();
     Protocol.Debugger.scheduleStepIntoAsync().then(InspectorTest.logMessage);
     Protocol.Debugger.scheduleStepIntoAsync().then(InspectorTest.logMessage);
     Protocol.Debugger.stepInto();
     await waitPauseAndDumpLocation();
@@ skipping 78 matching lines @@
     Protocol.Debugger.scheduleStepIntoAsync().then(InspectorTest.logMessage);
     Protocol.Debugger.stepOver();
     await waitPauseAndDumpLocation();
     await Protocol.Debugger.resume();
   }
 ]);
 
 async function waitPauseAndDumpLocation() {
   var message = await Protocol.Debugger.oncePaused();
   InspectorTest.log('paused at:');
-  InspectorTest.logSourceLocation(message.params.callFrames[0].location);
+  session.logSourceLocation(message.params.callFrames[0].location);
   return message;
 }