[WebSocket] Send a close frame when the renderer process is gone.

net/data/websocket/websocket_shared_worker.html

Index: net/data/websocket/websocket_shared_worker.html
diff --git a/net/data/websocket/websocket_shared_worker.html b/net/data/websocket/websocket_shared_worker.html
index 7acb4ab37415f6398e7e552d96623fb78952f87a..2156465f813f1e21f153e1e9282b74646d41832d 100644
--- a/net/data/websocket/websocket_shared_worker.html
+++ b/net/data/websocket/websocket_shared_worker.html
@@ -7,14 +7,8 @@ function log(message)
   document.getElementById("result").innerHTML += message + "<br>";
 }
 var worker = new SharedWorker("websocket_worker_simple.js");
-var href = window.location.href;
-var hostBegin = href.indexOf("/") + 2;
-var hostEnd = href.lastIndexOf(":");
-var host = href.slice(hostBegin, hostEnd);
-var portBegin = hostEnd + 1;
-var portEnd = href.lastIndexOf("/");
-var port = href.slice(portBegin, portEnd);
-var url = "ws://" + host + ":" + port + "/echo-with-no-extension";
+var protocol = location.protocol.replace('http', 'ws');
+var url = protocol + '//' + location.host + '/echo-with-no-extension';
 worker.port.onmessage = function (evt) {
   log(evt.data);
   if (evt.data == "DONE") {
@@ -28,4 +22,3 @@ worker.port.postMessage(url);
 </script>
 </body>
 </html>
-