Rolls back fix of SecurityContext method names.

tests/standalone/io/https_unauthorized_test.dart

Index: tests/standalone/io/https_unauthorized_test.dart
diff --git a/tests/standalone/io/https_unauthorized_test.dart b/tests/standalone/io/https_unauthorized_test.dart
index cfa54c201ed8371fb709f9a75ae98c59865379be..a556626d863058f089544bf0c61fd6080b9f8a4d 100644
--- a/tests/standalone/io/https_unauthorized_test.dart
+++ b/tests/standalone/io/https_unauthorized_test.dart
@@ -16,13 +16,12 @@ const CERTIFICATE = "localhost_cert";
 String localFile(path) => Platform.script.resolve(path).toFilePath();
 
 SecurityContext untrustedServerContext = new SecurityContext()
-  ..useCertificateChainSync(localFile(
-      'certificates/untrusted_server_chain.pem'))
-  ..usePrivateKeySync(localFile('certificates/untrusted_server_key.pem'),
-                      password: 'dartdart');
+  ..useCertificateChain(localFile('certificates/untrusted_server_chain.pem'))
+  ..usePrivateKey(localFile('certificates/untrusted_server_key.pem'),
+                  password: 'dartdart');
 
 SecurityContext clientContext = new SecurityContext()
-  ..setTrustedCertificatesSync(localFile('certificates/trusted_certs.pem'));
+  ..setTrustedCertificates(localFile('certificates/trusted_certs.pem'));
 
 Future<SecureServerSocket> runServer() {
   return HttpServer.bindSecure(