Add getter for lineMode and echoMode for Stdin.

runtime/bin/stdio_patch.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.
 
 patch class _StdIOUtils {
   static Stdin _getStdioInputStream() {
     switch (_getStdioHandleType(0)) {
       case _STDIO_HANDLE_TYPE_TERMINAL:
       case _STDIO_HANDLE_TYPE_PIPE:
       case _STDIO_HANDLE_TYPE_SOCKET:
@@ skipping 23 matching lines @@
     var result = _getSocketType(nativeSocket);
     if (result is OSError) {
       throw new FileSystemException("Error retreiving socket type", result);
     }
     return result;
   }
 }
 
 patch class Stdin {
   /* patch */ int readByteSync() native "Stdin_ReadByte";
-  /* patch */ void set echoMode(bool enabled) native "Stdin_SetEchoMode";
-  /* patch */ void set lineMode(bool enabled) native "Stdin_SetLineMode";
+
+  /* patch */ bool get echoMode => _echoMode;
+  /* patch */ void set echoMode(bool enabled) { _echoMode = enabled; }
+
+  /* patch */ bool get lineMode => _lineMode;
+  /* patch */ void set lineMode(bool enabled) { _lineMode = enabled; }
+
+  static bool get _echoMode native "Stdin_GetEchoMode";
+  static void set _echoMode(bool enabled) native "Stdin_SetEchoMode";
+  static bool get _lineMode native "Stdin_GetLineMode";
+  static void set _lineMode(bool enabled) native "Stdin_SetLineMode";
 }
 
 
 _getStdioHandle(_NativeSocket socket, int num) native "Socket_GetStdioHandle";
 _getStdioHandleType(int num) native "File_GetStdioHandleType";
 _getSocketType(_NativeSocket nativeSocket) native "Socket_GetType";