Change all File APIs to make the mode and encoding arguments named

utils/pub/io.dart

Index: utils/pub/io.dart
diff --git a/utils/pub/io.dart b/utils/pub/io.dart
index 3f54fcdd915cac4bc05e4dafd5d77f119ff3c5b8..51c3f1314ac5cbdab8fa4162331bf879fda9f28c 100644
--- a/utils/pub/io.dart
+++ b/utils/pub/io.dart
@@ -1,4 +1,4 @@
-// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
+// 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.
 
@@ -39,7 +39,7 @@ bool fileExists(String file) =>
 
 /// Reads the contents of the text file [file].
 String readTextFile(String file) =>
-    new File(file).readAsStringSync(Encoding.UTF_8);
+    new File(file).readAsStringSync(encoding: Encoding.UTF_8);
 
 /// Reads the contents of the binary file [file].
 List<int> readBinaryFile(String file) {
@@ -71,7 +71,7 @@ void deleteFile(String file) {
 /// Creates [file] and writes [contents] to it.
 String writeBinaryFile(String file, List<int> contents) {
   log.io("Writing ${contents.length} bytes to binary file $file.");
-  new File(file).openSync(FileMode.WRITE)
+  new File(file).openSync(mode: FileMode.WRITE)
       ..writeListSync(contents, 0, contents.length)
       ..closeSync();
   log.fine("Wrote text file $file.");