[inspector] Refactor protocol-test.js

test/inspector/debugger/caught-uncaught-exceptions.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.log("Check that inspector correctly passes caught/uncaught information.");
+let {session, contextGroup, Protocol} = InspectorTest.start("Check that inspector correctly passes caught/uncaught information.");
 
-InspectorTest.addScript(
+contextGroup.addScript(
 `function throwCaught() { try { throw new Error(); } catch (_) {} }
  function throwUncaught() { throw new Error(); }
  function schedule(f) { setTimeout(f, 0); }
 `);
 
 Protocol.Debugger.enable();
 
 Protocol.Debugger.setPauseOnExceptions({ "state": "all" });
 Protocol.Debugger.onPaused(message => {
   InspectorTest.log("paused in " + message.params.callFrames[0].functionName);
   InspectorTest.log("uncaught: " + message.params.data.uncaught);
   Protocol.Debugger.resume();
 });
 
 Protocol.Runtime.evaluate({ "expression": "schedule(throwCaught);" })
   .then(() => Protocol.Runtime.evaluate(
       { "expression": "schedule(throwUncaught);" }))
   .then(() => InspectorTest.completeTest());