[inspector] Refactor protocol-test.js

test/inspector/debugger/return-break-locations.js

Index: test/inspector/debugger/return-break-locations.js
diff --git a/test/inspector/debugger/return-break-locations.js b/test/inspector/debugger/return-break-locations.js
index 73e0416b0d592131f0dca3145b6d8a8d3efa37ef..b253b88417d00f136a44d1aac85365c9867d76fe 100644
--- a/test/inspector/debugger/return-break-locations.js
+++ b/test/inspector/debugger/return-break-locations.js
@@ -2,9 +2,9 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-InspectorTest.log('Return break locations within function');
+let {session, contextGroup, Protocol} = InspectorTest.start('Return break locations within function');
 
-InspectorTest.addScript(`
+contextGroup.addScript(`
 function fib(x) {
   if (x < 0) return;
   if (x === 0) return 1;