SDK fixes

test/dart_codegen/expect/_internal/iterable.dart

 part of dart._internal;
  abstract class EfficientLength {int get length;
 }
  abstract class ListIterable<E> extends IterableBase<E> implements EfficientLength {int get length;
  E elementAt(int i);
  const ListIterable();
  Iterator<E> get iterator => new ListIterator<E>(this);
  void forEach(void action(E element)) {
 int length = this.length;
  for (int i = 0; i < length; i++) {
@@ skipping 559 matching lines @@
  Iterable<E> skip(int count) {
 RangeError.checkNotNegative(count, "count");
  return this;
 }
  Iterable<E> skipWhile(bool test(E element)) => this;
  Iterable<E> take(int count) {
 RangeError.checkNotNegative(count, "count");
  return this;
 }
  Iterable<E> takeWhile(bool test(E element)) => this;
- List toList({
+ List<E> toList({
 bool growable : true}
 ) => growable ? <E> [] : new List<E>(0);
- Set toSet() => new Set<E>();
+ Set<E> toSet() => new Set<E>();
 }
  class EmptyIterator<E> implements Iterator<E> {const EmptyIterator();
  bool moveNext() => false;
  E get current => null;
 }
  abstract class BidirectionalIterator<T> implements Iterator<T> {bool movePrevious();
 }
  class IterableMixinWorkaround<T> {static bool contains(Iterable iterable, var element) {
 for (final e in iterable) {
 if (e == element) return true;
@@ skipping 359 matching lines @@
 }
  abstract class IterableElementError {static StateError noElement() => new StateError("No element");
  static StateError tooMany() => new StateError("Too many elements");
  static StateError tooFew() => new StateError("Too few elements");
 }
  typedef Iterable<T> __CastType0<S, T>(S __u1);
  typedef bool __CastType3<E>(E __u4);
  typedef bool __CastType5<E>(E __u6);
  typedef bool __CastType7<T>(T __u8);
  typedef bool __CastType9(dynamic __u10);