[inspector] Refactor protocol-test.js

test/inspector/debugger/stepping-with-blackboxed-ranges.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 that blackboxed ranges are respected while stepping');
+
+contextGroup.addScript(
 `function blackboxedBoo()
 {
     var a = 42;
     var b = foo();
     return a + b;
 }
 //# sourceURL=blackboxed-script.js`);
 
-InspectorTest.addScript(
+contextGroup.addScript(
 `function notBlackboxedFoo()
 {
     var a = 42;
     var b = blackboxedBoo();
     return a + b;
 }
 
 function blackboxedFoo()
 {
     var a = 42;
     var b = notBlackboxedFoo();
     return a + b;
 }
 
 function notBlackboxedBoo()
 {
     var a = 42;
     var b = blackboxedFoo();
     return a + b;
 }
 //# sourceURL=mixed-source.js`);
 
-InspectorTest.addScript(
+contextGroup.addScript(
 `function testFunction()
 {
     notBlackboxedBoo(); // for setup ranges and stepOut
     notBlackboxedBoo(); // for stepIn
 }
 
 function foo()
 {
     debugger;
     return 239;
@@ skipping 76 matching lines @@
 
 function printCallFrames(callFrames)
 {
   var topCallFrame = callFrames[0];
   if (topCallFrame.functionName.startsWith("blackboxed"))
     InspectorTest.log("FAIL: blackboxed function in top call frame");
   for (var callFrame of callFrames)
     InspectorTest.log(callFrame.functionName + ": " + callFrame.location.lineNumber + ":" + callFrame.location.columnNumber);
   InspectorTest.log("");
 }