Rolls back fix of SecurityContext method names.

tests/standalone/io/secure_unauthorized_test.dart

Index: tests/standalone/io/secure_unauthorized_test.dart
diff --git a/tests/standalone/io/secure_unauthorized_test.dart b/tests/standalone/io/secure_unauthorized_test.dart
index 097a0d01d6da7eb79a8746f8c1c848626cb26115..a600d7458f3ab0b1f444217dbc365a4fb1b77972 100644
--- a/tests/standalone/io/secure_unauthorized_test.dart
+++ b/tests/standalone/io/secure_unauthorized_test.dart
@@ -14,10 +14,9 @@ const HOST_NAME = "localhost";
 String localFile(path) => Platform.script.resolve(path).toFilePath();
 
 SecurityContext serverContext = 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');
 
 Future<SecureServerSocket> runServer() {
   return SecureServerSocket.bind(HOST_NAME, 0, serverContext)