Rolls back fix of SecurityContext method names.

tests/standalone/io/secure_server_closing_test.dart

Index: tests/standalone/io/secure_server_closing_test.dart
diff --git a/tests/standalone/io/secure_server_closing_test.dart b/tests/standalone/io/secure_server_closing_test.dart
index 1e2a2d7b2db9b7f886f0070490ef9ca6b65bebdf..159c6ae432b7583342fc9d152249773c46245a9a 100644
--- a/tests/standalone/io/secure_server_closing_test.dart
+++ b/tests/standalone/io/secure_server_closing_test.dart
@@ -18,13 +18,12 @@ InternetAddress HOST;
 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'));
 
 void testCloseOneEnd(String toClose) {
   asyncStart();