Remove accidental addition of new stream API in dart:io.

runtime/bin/process_patch.dart

 // Copyright (c) 2012, 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 _WindowsCodePageDecoder {
   /* patch */ static String _decodeBytes(List<int> bytes)
       native "SystemEncodingToString";
 }
 
 
@@ skipping 238 matching lines @@
   bool kill([ProcessSignal signal = ProcessSignal.SIGTERM]) {
     if (signal is! ProcessSignal) {
       throw new ArgumentError(
           "Argument 'signal' must be a ProcessSignal");
     }
     assert(_started);
     if (_ended) return false;
     return _kill(this, signal._signalNumber);
   }
 
-  void add(List<int> data) {
-    stdin.write(data);
-  }
-
-  void close() {
-    stdin.close();
-  }
-
-  void signalError(ASyncError error) {
-    // TODO(ajohnsen): close?
-  }
-
-  Stream<List<int>> get stdoutStream
-    => new _InputStreamController(stdout).stream;
-
-  Stream<List<int>> get stderrStream
-    => new _InputStreamController(stderr).stream;
-
   bool _kill(Process p, int signal) native "Process_Kill";
 
   void set onExit(void callback(int exitCode)) {
     if (_ended) callback(_exitCode);
     _onExit = callback;
   }
 
   String _path;
   List<String> _arguments;
   String _workingDirectory;
@@ skipping 101 matching lines @@
 
 class _ProcessResult implements ProcessResult {
   const _ProcessResult(int this.exitCode,
                        String this.stdout,
                        String this.stderr);
 
   final int exitCode;
   final String stdout;
   final String stderr;
 }