Rolls back fix of SecurityContext method names.

tests/standalone/io/secure_multiple_client_server_test.dart

Index: tests/standalone/io/secure_multiple_client_server_test.dart
diff --git a/tests/standalone/io/secure_multiple_client_server_test.dart b/tests/standalone/io/secure_multiple_client_server_test.dart
index 95156885f9a90223ec86f5968c0cb32bac1d36a8..a0577df57ec31caba063cf04d0dd99d345b8ab62 100644
--- a/tests/standalone/io/secure_multiple_client_server_test.dart
+++ b/tests/standalone/io/secure_multiple_client_server_test.dart
@@ -19,12 +19,12 @@ SecureServerSocket SERVER;
 String localFile(path) => Platform.script.resolve(path).toFilePath();
 
 SecurityContext serverContext = new SecurityContext()
-  ..useCertificateChainSync(localFile('certificates/server_chain.pem'))
-  ..usePrivateKeySync(localFile('certificates/server_key.pem'),
-                      password: 'dartdart');
+  ..useCertificateChain(localFile('certificates/server_chain.pem'))
+  ..usePrivateKey(localFile('certificates/server_key.pem'),
+                  password: 'dartdart');
 
 SecurityContext clientContext = new SecurityContext()
-  ..setTrustedCertificatesSync(localFile('certificates/trusted_certs.pem'));
+  ..setTrustedCertificates(localFile('certificates/trusted_certs.pem'));
 
 Future startServer() {
   return SecureServerSocket.bind(HOST, 0, serverContext).then((server) {