[inspector] Refactor protocol-test.js

test/inspector/debugger/get-possible-breakpoints-master.js

Index: test/inspector/debugger/get-possible-breakpoints-master.js
diff --git a/test/inspector/debugger/get-possible-breakpoints-master.js b/test/inspector/debugger/get-possible-breakpoints-master.js
index 482f68f87ff4c54b7487b5b20671bc484d2c1c7a..07f90e7a251b7350bbaff063538c2d8246da486e 100644
--- a/test/inspector/debugger/get-possible-breakpoints-master.js
+++ b/test/inspector/debugger/get-possible-breakpoints-master.js
@@ -4,10 +4,10 @@
 
 // Flags: --turbo
 
-InspectorTest.log('Checks Debugger.getPossibleBreakpoints');
+let {session, contextGroup, Protocol} = InspectorTest.start('Checks Debugger.getPossibleBreakpoints');
 
 var source = utils.read('test/inspector/debugger/resources/break-locations.js');
-InspectorTest.addScript(source);
+contextGroup.addScript(source);
 
 Protocol.Debugger.onceScriptParsed()
   .then(message => Protocol.Debugger.getPossibleBreakpoints({ start: { lineNumber: 0, columnNumber : 0, scriptId: message.params.scriptId }}))