Make List.skip, List.take and List.reversed return Iterables, not Lists.

sdk/lib/collection/collections.dart

Index: sdk/lib/collection/collections.dart
diff --git a/sdk/lib/collection/collections.dart b/sdk/lib/collection/collections.dart
index 81dd6da380856b7cbeae9a3322a3fd3bdbcf1a0c..18c1d7b73c02e56818d2f213cffe382095815990 100644
--- a/sdk/lib/collection/collections.dart
+++ b/sdk/lib/collection/collections.dart
@@ -318,7 +318,7 @@ class IterableMixinWorkaround {
   }
 
   static Iterable mapList(List list, f(var element)) {
-    return new MappedListIterable(list, f, 0, null);
+    return new MappedListIterable(list, f);
   }
 
   static List mappedByList(List list, f(var element)) {
@@ -333,7 +333,7 @@ class IterableMixinWorkaround {
   static Iterable takeList(List list, int n) {
     // The generic type is currently lost. It will be fixed with mixins.
     // This is currently a List as well as an Iterable.
-    return new ListView(list, 0, n);
+    return new SubListIterable(list, 0, n);
   }
 
   static Iterable takeWhile(Iterable iterable, bool test(var value)) {
@@ -344,7 +344,7 @@ class IterableMixinWorkaround {
   static Iterable skipList(List list, int n) {
     // The generic type is currently lost. It will be fixed with mixins.
     // This is currently a List as well as an Iterable.
-    return new ListView(list, n, null);
+    return new SubListIterable(list, n, null);
   }
 
   static Iterable skipWhile(Iterable iterable, bool test(var value)) {
@@ -352,8 +352,8 @@ class IterableMixinWorkaround {
     return new SkipWhileIterable(iterable, test);
   }
 
-  static List reversedList(List l) {
-    return new ReversedListView(l, 0, null);
+  static Iterable reversedList(List l) {
+    return new ReversedListIterable(l);
   }
 
   static void sortList(List l, int compare(a, b)) {