Rename File.readAsText to File.readAsString. There is no Text type in Dart

utils/pub/io.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.
 
 /**
  * Helper functionality to make working with IO easier.
  */
 library io;
 
 import 'dart:io';
@@ skipping 100 matching lines @@
  */
 Future<bool> fileExists(file) {
   return new File(_getPath(file)).exists();
 }
 
 /**
  * Reads the contents of the text file [file], which can either be a [String] or
  * a [File].
  */
 Future<String> readTextFile(file) {
-  return new File(_getPath(file)).readAsText(Encoding.UTF_8);
+  return new File(_getPath(file)).readAsString(Encoding.UTF_8);
 }
 
 /**
  * Creates [file] (which can either be a [String] or a [File]), and writes
  * [contents] to it. Completes when the file is written and closed.
  */
 Future<File> writeTextFile(file, String contents) {
   file = new File(_getPath(file));
   return file.open(FileMode.WRITE).chain((opened) {
     return opened.writeString(contents).chain((ignore) {
@@ skipping 614 matching lines @@
   return new Directory(entry);
 }
 
 /**
  * Gets a [Uri] for [uri], which can either already be one, or be a [String].
  */
 Uri _getUri(uri) {
   if (uri is Uri) return uri;
   return new Uri.fromString(uri);
 }