[inspector] Refactor protocol-test.js

test/inspector/debugger/step-snapshot.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.
 
 // Embed a user function in the snapshot and step through it.
 
 // Flags: --embed 'function c(f, ...args) { return f(...args); }'
 
-InspectorTest.setupScriptMap();
+let {session, contextGroup, Protocol} = InspectorTest.start('Tests that stepping works on snapshotted function');
+session.setupScriptMap();
 
-InspectorTest.addScript(`
+contextGroup.addScript(`
 function test() {
   function f(x) {
     return x * 2;
   }
   debugger;
   c(f, 2);
 }
 //# sourceURL=test.js`);
 
 Protocol.Debugger.onPaused(message => {
   InspectorTest.log("paused");
   var frames = message.params.callFrames;
-  InspectorTest.logSourceLocation(frames[0].location);
+  session.logSourceLocation(frames[0].location);
   Protocol.Debugger.stepInto();
 })
 
 Protocol.Debugger.enable()
   .then(() => Protocol.Runtime.evaluate({ expression: 'test()' }))
   .then(InspectorTest.completeTest);