[inspector] Refactor protocol-test.js

test/inspector/debugger/side-effect-free-debug-evaluate.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: --ignition --turbo
+let {session, contextGroup, Protocol} = InspectorTest.start('Tests side-effect-free evaluation');
 
-InspectorTest.addScript(`
+contextGroup.addScript(`
 function testFunction()
 {
   var o = 0;
   function f() { return 1; }
   function g() { o = 2; return o; }
   debugger;
 }
 //# sourceURL=foo.js`);
 
 Protocol.Debugger.enable();
@@ skipping 29 matching lines @@
   InspectorTest.log("f() returns " + response.result.result.value);
   Protocol.Debugger.evaluateOnCallFrame({ callFrameId: topFrameId, expression: "g()", throwOnSideEffect: true}).then(evaluatedFourth);
   InspectorTest.completeTest();
 }
 
 function evaluatedFourth(response)
 {
   InspectorTest.log("g() throws " + response.result.result.className);
   InspectorTest.completeTest();
 }