Delete chrome/test/data/workers since it's not used anymore. It was copied in r148205 in preparatio…

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);
-    };
-  };
-} 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);
-    }
-  }
-}