Remove the LineTransformer from dart:io

tests/standalone/io/secure_socket_renegotiate_test.dart

Index: tests/standalone/io/secure_socket_renegotiate_test.dart
diff --git a/tests/standalone/io/secure_socket_renegotiate_test.dart b/tests/standalone/io/secure_socket_renegotiate_test.dart
index b93824428524cc6f399786e6b80f7f62d79b0d2d..54736a8ea09d97d6d2b11c202721a335ae6ca688 100644
--- a/tests/standalone/io/secure_socket_renegotiate_test.dart
+++ b/tests/standalone/io/secure_socket_renegotiate_test.dart
@@ -6,11 +6,13 @@
 // are in separate processes, and that connection renegotiation works, and
 // can request a client certificate to be sent.
 
-import "package:expect/expect.dart";
-import "package:path/path.dart";
 import "dart:async";
+import "dart:convert";
 import "dart:io";
 
+import "package:expect/expect.dart";
+import "package:path/path.dart";
+
 const HOST_NAME = "localhost";
 const CERTIFICATE = "localhost_cert";
 
@@ -29,7 +31,7 @@ Future<SecureServerSocket> runServer() {
 
         StreamIterator<String> input =
             new StreamIterator(socket.transform(new StringDecoder())
-                                     .transform(new LineTransformer()));
+                                     .transform(new LineSplitter()));
         input.moveNext().then((success) {
           Expect.isTrue(success);
           Expect.equals('first', input.current);