[inspector] Refactor protocol-test.js

test/inspector/debugger/schedule-step-into-async-set-timeout.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 with setTimeout.');
-InspectorTest.setupScriptMap();
+let {session, contextGroup, Protocol} = InspectorTest.start('Checks Debugger.scheduleStepIntoAsync with setTimeout.');
+session.setupScriptMap();
 Protocol.Debugger.enable();
 InspectorTest.runAsyncTestSuite([
   async function testSetTimeout() {
     Protocol.Runtime.evaluate({expression: 'debugger; setTimeout(() => 1, 0);'});
     await Protocol.Debugger.oncePaused();
     Protocol.Debugger.stepOver();
     await waitPauseAndDumpLocation();
     Protocol.Debugger.scheduleStepIntoAsync();
     Protocol.Debugger.stepOver();
     await waitPauseAndDumpLocation();
@@ skipping 18 matching lines @@
     Protocol.Runtime.evaluate({expression: 'debugger;\nsetTimeout(\'debugger//should-break-here\', 0);\nsetTimeout(() => 1, 0);'});
     await Protocol.Debugger.oncePaused();
     Protocol.Debugger.stepOver();
     await Protocol.Debugger.oncePaused();
     Protocol.Debugger.stepOver();
     await waitPauseAndDumpLocation();
     Protocol.Debugger.scheduleStepIntoAsync();
     Protocol.Debugger.stepOver();
     await waitPauseAndDumpLocation();
     await Protocol.Debugger.resume();
-    await InspectorTest.waitPendingTasks();
+    await InspectorTest.waitForPendingTasks();
   },
 
   async function testSetTimeoutWithoutJS() {
     Protocol.Runtime.evaluate({expression: 'debugger; setTimeout(\'}\', 0);\nsetTimeout(\'var a = 239;\', 0);\nsetTimeout(\'debugger//should-break-here\', 0);'});
     await Protocol.Debugger.oncePaused();
     Protocol.Debugger.stepOver();
     await waitPauseAndDumpLocation();
     Protocol.Debugger.scheduleStepIntoAsync();
     Protocol.Debugger.stepOver();
     await waitPauseAndDumpLocation();
     await Protocol.Debugger.resume();
   },
 
   async function testResume() {
     Protocol.Debugger.pause();
     Protocol.Runtime.evaluate({expression: 'setTimeout(() => 42, 0)'});
     await waitPauseAndDumpLocation();
     Protocol.Debugger.scheduleStepIntoAsync();
     Protocol.Debugger.resume();
     await waitPauseAndDumpLocation();
     await Protocol.Debugger.resume();
   }
 ]);
 
 async function waitPauseAndDumpLocation() {
   var message = await Protocol.Debugger.oncePaused();
   InspectorTest.log('paused at:');
-  await InspectorTest.logSourceLocation(message.params.callFrames[0].location);
+  await session.logSourceLocation(message.params.callFrames[0].location);
   return message;
 }