- Use dart:typedata types in the Dart API calls.

runtime/bin/file_patch.dart

Index: runtime/bin/file_patch.dart
===================================================================
--- runtime/bin/file_patch.dart	(revision 19847)
+++ runtime/bin/file_patch.dart	(working copy)
@@ -35,6 +35,6 @@
   /* patch */ static _flush(int id) native "File_Flush";
 }
 
-List<int> _makeUint8ListView(List<int> source, int from, int to) {
-  return new Uint8List.view(source.asByteArray(), from, to);
+Uint8List _makeUint8ListView(Uint8List source, int offsetInBytes, int length) {
+  return new Uint8List.view(source.buffer, offsetInBytes, length);
 }