Adds SecurityContext.usePrivateKeyBytes

tests/standalone/io/secure_bad_certificate_test.dart

Index: tests/standalone/io/secure_bad_certificate_test.dart
diff --git a/tests/standalone/io/secure_bad_certificate_test.dart b/tests/standalone/io/secure_bad_certificate_test.dart
index 6a7e93a7f07b9b10aef5ffb89a77f4b42957c32b..c6ee7e069e8970518fca6642961cc4ace6052c07 100644
--- a/tests/standalone/io/secure_bad_certificate_test.dart
+++ b/tests/standalone/io/secure_bad_certificate_test.dart
@@ -12,11 +12,12 @@ import "package:expect/expect.dart";
 final 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');
+  ..usePrivateKeyAsBytes(readLocalFile('certificates/server_key.pem'),
+                         password: 'dartdart');
 
 class CustomException {}
 
@@ -81,4 +82,4 @@ Future runClient(int port,
       Expect.fail('Unknown expectation $result');
     }
   }
-}
+}