Remove the LineTransformer from dart:io

tests/standalone/io/stdin_sync_test.dart

Index: tests/standalone/io/stdin_sync_test.dart
diff --git a/tests/standalone/io/stdin_sync_test.dart b/tests/standalone/io/stdin_sync_test.dart
index f687837f7366645032e37852277b6ab8aac5ffc9..0ac4e9df5d502d7b374a01244285d53bbc58fa4e 100644
--- a/tests/standalone/io/stdin_sync_test.dart
+++ b/tests/standalone/io/stdin_sync_test.dart
@@ -2,10 +2,12 @@
 // 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.
 
-import "package:path/path.dart";
+import "dart:convert";
 import "dart:io";
 import "dart:json";
 
+import "package:path/path.dart";
+
 void testReadByte() {
   void test(String line, List<String> expected) {
     var script = join(dirname(Platform.script), "stdin_sync_script.dart");
@@ -16,14 +18,14 @@ void testReadByte() {
       process.stdin.close();
       process.stderr
           .transform(new StringDecoder())
-          .transform(new LineTransformer())
+          .transform(new LineSplitter())
           .fold(new StringBuffer(), (b, d) => b..write(d))
           .then((data) {
             if (data.toString() != '') throw "Bad output: '$data'";
           });
       process.stdout
           .transform(new StringDecoder())
-          .transform(new LineTransformer())
+          .transform(new LineSplitter())
           .fold(new StringBuffer(), (b, d) => b..write(d))
           .then((data) {
             if (data.toString() != 'true') throw "Bad output: '$data'";