js-test.js: Allow creating a CompositorWorker.

LayoutTests/resources/js-test.js

 // js-test now supports lazily printing test results which dumps all test
 // results once at the end of the test instead of building them up. To enable
 // this option, call setPrintTestResultsLazily() before running any tests.
 var _lazyTestResults; // Set by setPrintTestResultsLazily().
 
 // svg/dynamic-updates tests set enablePixelTesting=true, as we want to dump text + pixel results
 if (self.testRunner) {
     if (self.enablePixelTesting)
         testRunner.dumpAsTextWithPixelResults();
     else
@@ skipping 793 matching lines @@
             var span = document.createElement("span");
             span.innerHTML = msg + '<br />';
             consoleElement.appendChild(span);
         });
     }
 
     if (self.jsTestIsAsync && self.testRunner)
         testRunner.notifyDone();
 }
 
-function startWorker(testScriptURL, shared)
+function startWorker(testScriptURL, workerType)
 {
+    var shared = workerType == 'shared';
+    var compositor = workerType == 'compositor';

[kinuko, 2015/05/18 05:36:58]

nit: not sure if having these locals help anything compared with writing like
"if (workerType == 'shared')" directly on line 821 etc?

[sadrul, 2015/05/18 18:07:10]

Done.

     self.jsTestIsAsync = true;
     debug('Starting worker: ' + testScriptURL);
-    var worker = shared ? new SharedWorker(testScriptURL, "Shared Worker") : new Worker(testScriptURL);
+    var worker;
+    if (shared)
+        worker = new SharedWorker(testScriptURL, "Shared Worker");
+    else if (compositor)
+        worker = new CompositorWorker(testScriptURL);
+    else
+        worker = new Worker(testScriptURL);
     worker.onmessage = function(event)
     {
         var workerPrefix = "[Worker] ";
         if (event.data.length < 5 || event.data.charAt(4) != ':') {
           debug(workerPrefix + event.data);
           return;
         }
         var code = event.data.substring(0, 4);
         var payload = workerPrefix + event.data.substring(5);
         if (code == "PASS")
@@ skipping 55 matching lines @@
     testPassed = function(msg) {
         workerPort.postMessage('PASS:' + msg);
     };
     finishJSTest = function() {
         workerPort.postMessage('DONE:');
     };
     debug = function(msg) {
         workerPort.postMessage(msg);
     };
 }