Adds SecurityContext.usePrivateKeyBytes

tests/standalone/io/web_socket_error_test.dart

Index: tests/standalone/io/web_socket_error_test.dart
diff --git a/tests/standalone/io/web_socket_error_test.dart b/tests/standalone/io/web_socket_error_test.dart
index cc16bde50f693029fad0be59ab9905b8448ca57b..991ab037a5dd349d29753095d909c2a03a51c52d 100644
--- a/tests/standalone/io/web_socket_error_test.dart
+++ b/tests/standalone/io/web_socket_error_test.dart
@@ -26,11 +26,12 @@ const String CERT_NAME = 'localhost_cert';
 const String HOST_NAME = 'localhost';
 
 String localFile(path) => Platform.script.resolve(path).toFilePath();
+List<int> readLocalFile(path) => (new File(localFile(path))).readAsBytesSync();
 
 SecurityContext serverContext = new SecurityContext()
   ..useCertificateChain(localFile('certificates/server_chain.pem'))
-  ..usePrivateKey(localFile('certificates/server_key.pem'),
-                  password: 'dartdart');
+  ..usePrivateKeyBytes(readLocalFile('certificates/server_key.pem'),
+                       password: 'dartdart');
 
 SecurityContext clientContext = new SecurityContext()
   ..setTrustedCertificates(file: localFile('certificates/trusted_certs.pem'));