Changed CreateWorker to coalesce any matching queued shared workers when a

chrome/test/data/workers/worker_common.js

+// Track the number of clients for this worker - tests can use this to ensure
+// that shared workers are actually shared, not distinct.
+var num_clients = 0;
+
 if (!self.postMessage) {
   // This is a shared worker - mimic dedicated worker APIs
   onconnect = function(event) {
+    num_clients++;
     event.ports[0].onmessage = function(e) {
+      self.postMessage = function(msg) {
+        event.ports[0].postMessage(msg);
+      };
       self.onmessage(e);
     };
-    self.postMessage = function(msg, ports) {
-      event.ports[0].postMessage(msg, ports);
-    };
   };
+} else {
+  num_clients++;
 }
 onmessage = function(evt) {
   if (evt.data == "ping")
     postMessage("pong");
   else if (evt.data == "auth")
     importScripts("/auth-basic");
+  else if (evt.data == "close")
+    close();
   else if (/eval.+/.test(evt.data)) {
     try {
       postMessage(eval(evt.data.substr(5)));
     } catch (ex) {
       postMessage(ex);
     }
   }
 }