Implement 'window.isSecureContext'.

third_party/WebKit/LayoutTests/http/tests/resources/get-host-info.js

 function get_host_info() {
   var ORIGINAL_HOST = '127.0.0.1';
   var REMOTE_HOST = 'localhost';
-  var UNAUTHENTICATED_HOST = 'example.test';
+  // TODO(mkwst): This should be a host that WPT supports. I don't know why we're using 'example.test'.
+  var OTHER_HOST = 'example.test';
   var HTTP_PORT = 8000;
   var HTTPS_PORT = 8443;
   try {
     // In W3C test, we can get the hostname and port number in config.json
     // using wptserve's built-in pipe.
     // http://wptserve.readthedocs.org/en/latest/pipes.html#built-in-pipes
     HTTP_PORT = eval('{{ports[http][0]}}');
     HTTPS_PORT = eval('{{ports[https][0]}}');
     ORIGINAL_HOST = eval('\'{{host}}\'');
     REMOTE_HOST = 'www1.' + ORIGINAL_HOST;
   } catch (e) {
   }
   return {
     HTTP_ORIGIN: 'http://' + ORIGINAL_HOST + ':' + HTTP_PORT,
     HTTPS_ORIGIN: 'https://' + ORIGINAL_HOST + ':' + HTTPS_PORT,
     HTTP_REMOTE_ORIGIN: 'http://' + REMOTE_HOST + ':' + HTTP_PORT,
     HTTPS_REMOTE_ORIGIN: 'https://' + REMOTE_HOST + ':' + HTTPS_PORT,
-    UNAUTHENTICATED_ORIGIN: 'http://' + UNAUTHENTICATED_HOST + ':' + HTTP_PORT
+    UNAUTHENTICATED_ORIGIN: 'http://' + OTHER_HOST + ':' + HTTP_PORT,
+    AUTHENTICATED_ORIGIN: 'https://' + OTHER_HOST + ':' + HTTPS_PORT
   };
 }