fix ddc build, adds some unsupported methods to dart:io

pkg/dev_compiler/tool/input_sdk/patch/io_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.
 
 import 'dart:_js_helper' show patch;
 
 @patch
 class _Directory {
   @patch
   static _current() {
@@ skipping 234 matching lines @@
   static _environment() {
     throw new UnsupportedError("Platform._environment");
   }
 
   @patch
   static String _version() {
     throw new UnsupportedError("Platform._version");
   }
 
   @patch
   static _ansiSupported() {

[vsm, 2017/03/17 21:36:50]

Looks like this one was removed too at the same time.

[Jennifer Messerly, 2017/03/17 22:56:59]

interesting! maybe we need our patch script to also print out/fail on unused
patches?

     throw new UnsupportedError("Platform._ansiSupported");
   }
 }
 
 @patch
 class _ProcessUtils {
   @patch
   static void _exit(int status) {
     throw new UnsupportedError("ProcessUtils._exit");
   }
@@ skipping 277 matching lines @@
 
   @patch
   bool get lineMode {
     throw new UnsupportedError("Stdin.lineMode");
   }
 
   @patch
   void set lineMode(bool enabled) {
     throw new UnsupportedError("Stdin.lineMode");
   }
+
+  @patch
+  bool get supportsAnsiEscapes {
+    throw new UnsupportedError("Stdin.supportsAnsiEscapes");
+  }
 }
 
 @patch
 class Stdout {
   @patch
   bool _hasTerminal(int fd) {
     throw new UnsupportedError("Stdout.hasTerminal");
   }
 
   @patch
   int _terminalColumns(int fd) {
     throw new UnsupportedError("Stdout.terminalColumns");
   }
 
   @patch
   int _terminalLines(int fd) {
     throw new UnsupportedError("Stdout.terminalLines");
   }
+
+  @patch
+  static bool _supportsAnsiEscapes(int fd) {
+    throw new UnsupportedError("Stdout.supportsAnsiEscapes");
+  }
 }
 
 @patch
 class _FileSystemWatcher {
   @patch
   static Stream<FileSystemEvent> _watch(
       String path, int events, bool recursive) {
     throw new UnsupportedError("_FileSystemWatcher.watch");
   }
 
   @patch
   static bool get isSupported {
     throw new UnsupportedError("_FileSystemWatcher.isSupported");
   }
 }
 
 @patch
 class _IOService {
   @patch
   static Future _dispatch(int request, List data) {
     throw new UnsupportedError("_IOService._dispatch");
   }
 }