[inspector] Refactor protocol-test.js

test/inspector/runtime/evaluate-async.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 works with awaitPromise flag.");
+let {session, contextGroup, Protocol} = InspectorTest.start("Tests that Runtime.evaluate works with awaitPromise flag.");
 
-InspectorTest.addScript(`
+contextGroup.addScript(`
 function createPromiseAndScheduleResolve()
 {
   var resolveCallback;
   var promise = new Promise((resolve) => resolveCallback = resolve);
   setTimeout(resolveCallback.bind(null, { a : 239 }), 0);
   return promise;
 }`);
 
 InspectorTest.runTestSuite([
   function testResolvedPromise(next)
@@ skipping 31 matching lines @@
       .then(() => next());
   },
 
   function testExceptionInEvaluate(next)
   {
     Protocol.Runtime.evaluate({ expression: "throw 239", awaitPromise: true })
       .then(result => InspectorTest.logMessage(result))
       .then(() => next());
   }
 ]);