Restore r1383: Fix method resolution to warn about things that don't exist on the declared type.

frog/utils.dart

Index: frog/utils.dart
diff --git a/frog/utils.dart b/frog/utils.dart
index f12d23dc7c14d0a1317409085d55e627dbcdb1a8..a308e4c715087e678209e54d4e2090372e26c033 100644
--- a/frog/utils.dart
+++ b/frog/utils.dart
@@ -52,7 +52,7 @@ List zip(Iterable left, Iterable right, mapper(left, right)) {
 /** Sorts the map by the key. */
 List orderValuesByKeys(Map map) {
   // TODO(jmesserly): it'd be nice to have SortedMap in corelib.
-  final keys = map.getKeys();
+  List keys = map.getKeys();

[jimhug, 2011/11/10 15:47:21]

Huh?  Was this change actually needed?

   keys.sort((x, y) => x.compareTo(y));
   final values = [];
   for (var k in keys) {