Use patching for dart:io.

runtime/bin/io.dart

Index: runtime/bin/io.dart
diff --git a/runtime/bin/io.dart b/runtime/bin/io.dart
index 36d02bb268ec580cf70e5145b5e8e9153f484d9f..f260f68d80e211f454297eb0a9238633c375f7b0 100644
--- a/runtime/bin/io.dart
+++ b/runtime/bin/io.dart
@@ -2,11 +2,11 @@
 // 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.
 
-// The dart:io library is the concatenation of all the files in
-// io_sources.gypi. This file needs to be the first file in that
-// concatenation.
+// We should be able to get rid of this file. This is used to set up
+// the dart:io library for the VM because it cannot use the actual library
+// file which is in lib/io/io.dart.
 
-#library("io");
+#library("dart:io");

[Anders Johnsen, 2012/10/30 10:43:06]

Afaik, this is not how we do this. It should just be 'io'. Maybe we should agree
on how all 'dart:...' libraries should be defined?

[Mads Ager (google), 2012/10/30 11:12:40]

I'm making this consistent with what is in the lib/foo/foo.dart files. This
makes it look right in dartdoc among other things.

 #import("dart:coreimpl");
 #import("dart:crypto");
 #import("dart:isolate");