[inspector] Refactor protocol-test.js

test/inspector/debugger/update-call-frame-scopes.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.addScript(
+let {session, contextGroup, Protocol} = InspectorTest.start('Tests updating call frame scopes');
+
+contextGroup.addScript(
 `function TestFunction()
 {
     var a = 2;
     debugger;
     debugger;
 }`);
 
 var newVariableValue = 55;
 
 Protocol.Debugger.enable();
@@ skipping 38 matching lines @@
   }
   if (varNamedA) {
     var actualValue = varNamedA.value.value;
     InspectorTest.log("New variable is " + actualValue + ", expected is " + newVariableValue + ", old was: 2");
     InspectorTest.log(actualValue === newVariableValue ? "SUCCESS" : "FAIL");
   } else {
     InspectorTest.log("Failed to find variable in scope");
   }
   InspectorTest.completeTest();
 }