[inspector] Refactor protocol-test.js

test/inspector/debugger/step-into-next-script.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('Debugger breaks in next script after stepOut from previous one.');
+let {session, contextGroup, Protocol} = InspectorTest.start('Debugger breaks in next script after stepOut from previous one.');
 
-InspectorTest.addScript(`
+contextGroup.addScript(`
 function test() {
   setTimeout('var a = 1;//# sourceURL=timeout1.js', 0);
   setTimeout(foo, 0);
   setTimeout('var a = 3;//# sourceURL=timeout3.js', 0);
   debugger;
 }
 //# sourceURL=foo.js`, 7, 26);
 
-InspectorTest.addScript(`
+contextGroup.addScript(`
 function foo() {
   return 42;
 }
 //# sourceURL=timeout2.js`)
 
-InspectorTest.setupScriptMap();
+session.setupScriptMap();
 var stepAction;
 Protocol.Debugger.onPaused(message => {
-  InspectorTest.logCallFrames(message.params.callFrames);
+  session.logCallFrames(message.params.callFrames);
   InspectorTest.log('');
   Protocol.Debugger[stepAction]();
 });
 Protocol.Debugger.enable()
 InspectorTest.runTestSuite([
   function testStepOut(next) {
     stepAction = 'stepOut';
     Protocol.Runtime.evaluate({ expression: 'test()' })
-      .then(() => InspectorTest.waitPendingTasks())
+      .then(() => InspectorTest.waitForPendingTasks())
       .then(next);
   },
 
   function testStepOver(next) {
     stepAction = 'stepOver';
     Protocol.Runtime.evaluate({ expression: 'test()' })
-      .then(() => InspectorTest.waitPendingTasks())
+      .then(() => InspectorTest.waitForPendingTasks())
       .then(next);
   },
 
   function testStepInto(next) {
     stepAction = 'stepInto';
     Protocol.Runtime.evaluate({ expression: 'test()' })
-      .then(() => InspectorTest.waitPendingTasks())
+      .then(() => InspectorTest.waitForPendingTasks())
       .then(next);
   }
 ]);