Enable XHR upload progress events for Workers.

LayoutTests/http/tests/xmlhttprequest/workers/resources/upload-onprogress-event.js

Index: LayoutTests/http/tests/xmlhttprequest/workers/resources/upload-onprogress-event.js
diff --git a/LayoutTests/http/tests/xmlhttprequest/workers/resources/file-not-found.js b/LayoutTests/http/tests/xmlhttprequest/workers/resources/upload-onprogress-event.js
similarity index 63%
copy from LayoutTests/http/tests/xmlhttprequest/workers/resources/file-not-found.js
copy to LayoutTests/http/tests/xmlhttprequest/workers/resources/upload-onprogress-event.js
index 47e163d7b807e88bc2ed398f7935afe6df6d6722..d070e0fedf53cec2eb949fb4e904db7ef42f1441 100644
--- a/LayoutTests/http/tests/xmlhttprequest/workers/resources/file-not-found.js
+++ b/LayoutTests/http/tests/xmlhttprequest/workers/resources/upload-onprogress-event.js
@@ -13,13 +13,16 @@ function log(message)
     console_messages.appendChild(item);
 }
 
-var worker = createWorker('resources/xmlhttprequest-file-not-found.js');
+var progress_ticks = 0;
+var worker = createWorker('resources/upload-onprogress-worker.js');
 worker.onmessage = function(evt)
 {
-    if (/log .+/.test(evt.data))
+    if (/log .+/.test(evt.data)) {
         log(evt.data.substr(4));
-    else if (/DONE/.test(evt.data)) {
-        log("PASS");
+    } else if (/tick .+/.test(evt.data)) {
+        progress_ticks++;
+    } else if (/DONE/.test(evt.data)) {
+        log(progress_ticks >= 1 ? "PASS" : "FAIL");
         if (window.testRunner)
             testRunner.notifyDone();
     }