[inspector] Refactor protocol-test.js

test/inspector/runtime/evaluate-with-generate-preview.js

 // Copyright 2016 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("Tests that Runtime.evaluate will generate correct previews.");
+let {session, contextGroup, Protocol} = InspectorTest.start("Tests that Runtime.evaluate will generate correct previews.");
 
-InspectorTest.addScript(
+contextGroup.addScript(
 `
 var f1 = function(){};
 
 Object.prototype[0] = 'default-first';
 var obj = {p1: {a:1}, p2: {b:'foo'}, p3: f1};
 Object.defineProperties(obj, {
   p4: {
     get() { return 2 }
   },
   p5: {
@@ skipping 40 matching lines @@
 var deterministicNativeFunction = Math.log;
 var parentObj = {};
 Object.defineProperty(parentObj, 'propNotNamedProto', {
   get: deterministicNativeFunction,
   set: function() {}
 });
 var objInheritsGetterProperty = {__proto__: parentObj};
 inspector.allowAccessorFormatting(objInheritsGetterProperty);
 `);
 
-InspectorTest.setupInjectedScriptEnvironment();
+contextGroup.setupInjectedScriptEnvironment();
 
 InspectorTest.runTestSuite([
   function testObjectPropertiesPreview(next)
   {
     Protocol.Runtime.evaluate({ "expression": "obj", "generatePreview": true })
         .then(result => InspectorTest.logMessage(result.result.result.preview))
         .then(next);
   },
 
   function testArrayPropertiesPreview(next)
@@ skipping 59 matching lines @@
         .then(next);
   },
 
   function testObjWithArrayAsProto(next)
   {
     Protocol.Runtime.evaluate({ "expression": "Object.create([1,2])", "generatePreview": true })
         .then(result => InspectorTest.logMessage(result.result.result.preview))
         .then(next);
   }
 ]);