[inspector] Refactor protocol-test.js

test/inspector/debugger/step-into.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.
 
 // Flags: --turbo
 
-InspectorTest.log('Checks possible break locations.');
+let {session, contextGroup, Protocol} = InspectorTest.start('Checks possible break locations.');
 
-InspectorTest.setupScriptMap();
+session.setupScriptMap();
 Protocol.Debugger.onPaused(message => {
   var frames = message.params.callFrames;
   if (frames.length === 1) {
     Protocol.Debugger.stepInto();
     return;
   }
   var scriptId = frames[0].location.scriptId;
   InspectorTest.log('break at:');
-  InspectorTest.logSourceLocation(frames[0].location)
+  session.logSourceLocation(frames[0].location)
     .then(() => Protocol.Debugger.stepInto());
 });
 
-InspectorTest.loadScript('test/inspector/debugger/resources/break-locations.js');
+contextGroup.loadScript('test/inspector/debugger/resources/break-locations.js');
 
 Protocol.Debugger.enable();
 Protocol.Runtime.evaluate({ expression: 'Object.keys(this).filter(name => name.indexOf(\'test\') === 0)', returnByValue: true })
   .then(runTests);
 
 function runTests(message) {
   var tests = message.result.result.value;
   InspectorTest.runTestSuite(tests.map(test => eval(`(function ${test}(next) {
     Protocol.Runtime.evaluate({ expression: 'debugger; ${test}()', awaitPromise: ${test.indexOf('testPromise') === 0}})
       .then(next);
   })`)));
 }