Worker: Import "imported/wpt/workers" tests (Retry)

third_party/WebKit/LayoutTests/imported/wpt/workers/support/Timer.js

+var count = 0;
+var id;
+
+onmessage = function(evt)
+{
+    try
+    {
+        switch(evt.data)
+        {
+            case "TimeoutHandler":
+                count = 0;
+                id = setTimeout("TimeoutHandler()", 10);
+                postMessage('hello');
+                break;
+            case "IntervalHandler":
+                count = 0;
+                id = setInterval("IntervalHandler()", 10);
+                postMessage('hello');
+                break;
+        }
+    }
+    catch(ex)
+    {
+        postMessage("Fail");
+    }
+}
+
+function TimeoutHandler()
+{
+    count++;
+    postMessage("worker");
+
+    id = setTimeout("TimeoutHandler()", 10);
+
+    if (count >= 2)
+    {
+        clearTimeout(id);
+    }
+}
+
+function IntervalHandler()
+{
+    count++;
+    postMessage("worker");
+
+    if (count >= 2)
+    {
+        clearInterval(id);
+    }
+}