The Tor Browser: dom/workers/test/simpleThread

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

     1 /**

     2  * Any copyright is dedicated to the Public Domain.

     3  * http://creativecommons.org/publicdomain/zero/1.0/

     4  */

     5 "use strict";

     7 function messageListener(event) {

     8   var exception;

     9   try {

    10     event.bubbles = true;

    11   }

    12   catch(e) {

    13     exception = e;

    14   }

    16   if (!(exception instanceof TypeError)) {

    17     throw exception;

    18   }

    20   switch (event.data) {

    21     case "no-op":

    22       break;

    23     case "components":

    24       postMessage(Components.toString());

    25       break;

    26     case "start":

    27       for (var i = 0; i < 1000; i++) { }

    28       postMessage("started");

    29       break;

    30     case "stop":

    31       self.postMessage('no-op');

    32       postMessage("stopped");

    33       self.removeEventListener("message", messageListener, false);

    34       break;

    35     default:

    36       throw 'Bad message: ' + event.data;

    37   }

    38 }

    40 if (!("DedicatedWorkerGlobalScope" in self)) {

    41   throw new Error("DedicatedWorkerGlobalScope should be visible!");

    42 }

    43 if (!(self instanceof DedicatedWorkerGlobalScope)) {

    44   throw new Error("The global should be a SharedWorkerGlobalScope!");

    45 }

    46 if (!(self instanceof WorkerGlobalScope)) {

    47   throw new Error("The global should be a WorkerGlobalScope!");

    48 }

    49 if ("SharedWorkerGlobalScope" in self) {

    50   throw new Error("SharedWorkerGlobalScope should not be visible!");

    51 }

    53 addEventListener("message", { handleEvent: messageListener });

The Tor Browser / file revision