[inspector] Refactor protocol-test.js

test/inspector/runtime/compile-script.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.
 
+let {session, contextGroup, Protocol} = InspectorTest.start('Tests Runtime.compileScript');
+
 var executionContextId;
 
 Protocol.Debugger.enable().then(onDebuggerEnabled);
 
 function onDebuggerEnabled()
 {
   Protocol.Runtime.enable();
   Protocol.Debugger.onScriptParsed(onScriptParsed);
   Protocol.Runtime.onExecutionContextCreated(onExecutionContextCreated);
 }
@@ skipping 26 matching lines @@
     executionContextId: executionContextId
   }).then(onCompiled);
 
   function onCompiled(messageObject)
   {
     InspectorTest.log("compilation result: ");
     InspectorTest.logMessage(messageObject);
     InspectorTest.log("-----");
   }
 }