Adds SecurityContext.usePrivateKeyBytes

tests/standalone/io/secure_unauthorized_test.dart

 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 // This test verifies that failing secure connection attempts always complete
 // their returned future.
 
 import "package:expect/expect.dart";
 import "package:path/path.dart";
 import "dart:async";
 import "dart:io";
 
 const 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/untrusted_server_chain.pem'))
-  ..usePrivateKey(localFile('certificates/untrusted_server_key.pem'),
-                  password: 'dartdart');
+  ..usePrivateKeyAsBytes(readLocalFile('certificates/untrusted_server_key.pem'),
+                         password: 'dartdart');
 
 Future<SecureServerSocket> runServer() {
   return SecureServerSocket.bind(HOST_NAME, 0, serverContext)
       .then((SecureServerSocket server) {
     server.listen((SecureSocket socket) {
       socket.listen((_) { },
                     onDone: () {
                       socket.close();
                     });
     }, onError: (e) => Expect.isTrue(e is HandshakeException));
@@ skipping 20 matching lines @@
       }
     });
   }
 
   runServer().then((server) {
     clientProcess(server.port).then((_) {
       server.close();
     });
   });
 }