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

samples/buildhook2/build.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";
 import "package:args/args.dart";
 
 bool cleanBuild;
 bool fullBuild;
 List<String> changedFiles;
@@ skipping 81 matching lines @@
 
 /**
  * Convert a .foo file to a .foobar file.
  */
 void _processFile(String arg) {
   if (arg.endsWith(".foo")) {
     print("processing: ${arg}");
 
     File file = new File(arg);
 
-    String contents = file.readAsTextSync();
+    String contents = file.readAsStringSync();
 
     File outFile = new File("${arg}bar");
 
     OutputStream out = outFile.openOutputStream();
     out.writeString("Processed from ${file.name}:\n");
     if (contents != null) {
       out.writeString(contents);
     }
     out.close();
 
     print("wrote     : ${outFile.name}");
   }
 }
 
 /**
  * If this file is a generated file (based on the extension), delete it.
  */
 void _maybeClean(String file) {
   if (file.endsWith(".foobar")) {
     new File(file).delete();
   }
 }