Map WebSocket URL schemes to HTTP URL schemes for auth purposes.

net/data/websocket/connect_to.html

Index: net/data/websocket/connect_to.html
diff --git a/net/data/websocket/connect_check.html b/net/data/websocket/connect_to.html
similarity index 56%
copy from net/data/websocket/connect_check.html
copy to net/data/websocket/connect_to.html
index 4a1ca8c5dfc0b7cb86b86f019a3a4038db867f35..05c653fc5d2ab9a333efea5b4c5eee83a03bbe07 100644
--- a/net/data/websocket/connect_check.html
+++ b/net/data/websocket/connect_to.html
@@ -5,14 +5,13 @@
 <script type="text/javascript">
 
 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 scheme = href.indexOf('https') >= 0 ? 'wss' : 'ws';
-var url = scheme + '://' + host + ':' + port + '/echo-with-no-extension';
+var queryBegin = href.indexOf('?url=');
+if (queryBegin == -1) {
+  console.log("Failed to find ?url= in URL");
+  document.title = 'FAIL';
+  throw "FAILURE";
+}
+var url = href.slice(queryBegin + 5);
 
 // Do connection test.
 var ws = new WebSocket(url);