Add getter for lineMode and echoMode for Stdin.

sdk/lib/io/stdio.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.
 
 part of dart.io;
 
 const int _STDIO_HANDLE_TYPE_TERMINAL = 0;
 const int _STDIO_HANDLE_TYPE_PIPE = 1;
 const int _STDIO_HANDLE_TYPE_FILE = 2;
 const int _STDIO_HANDLE_TYPE_SOCKET = 3;
@@ skipping 103 matching lines @@
         // Error during decoding.
         throw error;
       }
     }
 
     if (empty) return null;
     return line.toString();
   }
 
   /**
-   * Enable or disable echo mode on the [Stdin].
+   * Check if echo mode is enabled on [stdin].
+   */
+  external bool get echoMode;
+
+  /**
+   * Enable or disable echo mode on [stdin].
    *
    * If disabled, input from to console will not be echoed.
    *
    * Default depends on the parent process, but usually enabled.
    */
   external void set echoMode(bool enabled);
 
   /**
-   * Enable or disable line mode on the [Stdin].
+   * Check if line mode is enabled on [stdin].
+   */
+  external bool get lineMode;
+
+  /**
+   * Enable or disable line mode on [stdin].
    *
    * If enabled, characters are delayed until a new-line character is entered.
    * If disabled, characters will be available as typed.
    *
    * Default depends on the parent process, but usually enabled.
    */
   external void set lineMode(bool enabled);
 
   /**
    * Synchronously read a byte from stdin. This call will block until a byte is
@@ skipping 100 matching lines @@
   }
   return StdioType.OTHER;
 }
 
 
 class _StdIOUtils {
   external static IOSink _getStdioOutputStream(int fd);
   external static Stdin _getStdioInputStream();
   external static int _socketType(nativeSocket);
 }