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

samples/buildhook1/test.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.
 
 import "dart:io";
 
 /**
  * In order to generate test.foobar, make an edit to test.foo.
  */
 void main() {
   printContents("test.foo");
   print("");
   printContents("test.foobar");
 }
 
 void printContents(String file) {
   print("the contents of ${file} are:");
 
   var f = new File(file);
 
   if (f.existsSync()) {
-    String contents = new File(file).readAsTextSync();
+    String contents = new File(file).readAsStringSync();
 
     print("[${contents}]");
   } else {
     print("[]");
   }
 }