Adds SecurityContext.setTrustedCertificatesBytes

tests/standalone/io/secure_multiple_client_server_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.
 //
 // VMOptions=
 // VMOptions=--short_socket_read
 // VMOptions=--short_socket_write
 // VMOptions=--short_socket_read --short_socket_write
 
 import "dart:async";
 import "dart:io";
 
 import "package:async_helper/async_helper.dart";
 import "package:expect/expect.dart";
 
 InternetAddress HOST;
 SecureServerSocket SERVER;
 
 String localFile(path) => Platform.script.resolve(path).toFilePath();
 List<int> readLocalFile(path) => (new File(localFile(path))).readAsBytesSync();
 
 SecurityContext serverContext = new SecurityContext()
   ..useCertificateChainBytes(readLocalFile('certificates/server_chain.pem'))
   ..usePrivateKeyBytes(readLocalFile('certificates/server_key.pem'),
                          password: 'dartdart');
 
 SecurityContext clientContext = new SecurityContext()
-  ..setTrustedCertificates(file: localFile('certificates/trusted_certs.pem'));
+  ..setTrustedCertificatesBytes(
+      readLocalFile('certificates/trusted_certs.pem'));
 
 Future startServer() {
   return SecureServerSocket.bind(HOST, 0, serverContext).then((server) {
     SERVER = server;
     SERVER.listen((SecureSocket client) {
       client.fold(<int>[], (message, data) => message..addAll(data))
           .then((message) {
             String received = new String.fromCharCodes(message);
             Expect.isTrue(received.contains("Hello from client "));
             String name = received.substring(received.indexOf("client ") + 7);
@@ skipping 18 matching lines @@
 
 void main() {
   asyncStart();
   InternetAddress.lookup("localhost").then((hosts) => HOST = hosts.first)
       .then((_) => startServer())
       .then((_) => ['ale', 'bar', 'che', 'den', 'els'].map(testClient))
       .then((futures) => Future.wait(futures))
       .then((_) => SERVER.close())
       .then((_) => asyncEnd());
 }