Add Stdio.readByteSync and Stdio.readLineSync.

tests/standalone/io/stdin_sync_script.dart

Index: tests/standalone/io/stdin_sync_script.dart
diff --git a/tests/standalone/io/stdin_sync_script.dart b/tests/standalone/io/stdin_sync_script.dart
new file mode 100644
index 0000000000000000000000000000000000000000..acd35d221356afb5b7de5513db984f2d7ea824be
--- /dev/null
+++ b/tests/standalone/io/stdin_sync_script.dart
@@ -0,0 +1,28 @@
+// 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.
+
+import "dart:io";
+
+void main() {
+  int i = 0;
+  String line;
+  while ((line = stdin.readLineSync()) != null) {
+    switch (i) {
+      case 0:
+        if (line != 'hej\x01\x00') throw "bad line at $i";
+        break;
+
+      case 1:
+        if (line != '') throw "bad line at $i";
+        break;
+
+      case 2:
+        if (line != '4') throw "bad line at $i";
+        break;
+    }
+    i++;
+  }
+  if (i != 3 ) throw "expect 3 lines";
+  print('true');
+}