Add generic annotations to more SDK APIs.

sdk/lib/internal/iterable.dart

Index: sdk/lib/internal/iterable.dart
diff --git a/sdk/lib/internal/iterable.dart b/sdk/lib/internal/iterable.dart
index f3e316611ceea8b0d2912436114c534a7416cd11..7104c2767455a3d4e26f381171eaff80b392d56b 100644
--- a/sdk/lib/internal/iterable.dart
+++ b/sdk/lib/internal/iterable.dart
@@ -172,7 +172,8 @@ abstract class ListIterable<E> extends Iterable<E>
 
   Iterable<E> where(bool test(E element)) => super.where(test);
 
-  Iterable map(f(E element)) => new MappedListIterable(this, f);
+  Iterable/*<T>*/ map/*<T>*/(/*=T*/ f(E element)) =>
+      new MappedListIterable<E, dynamic/*=T*/ >(this, f);
 
   E reduce(E combine(var value, E element)) {
     int length = this.length;
@@ -188,7 +189,9 @@ abstract class ListIterable<E> extends Iterable<E>
     return value;
   }
 
-  fold(var initialValue, combine(var previousValue, E element)) {
+  /*=T*/ fold/*<T>*/(
+      var/*=T*/ initialValue, /*=T*/ combine(
+          var/*=T*/ previousValue, E element)) {
     var value = initialValue;
     int length = this.length;
     for (int i = 0; i < length; i++) {
@@ -555,7 +558,7 @@ class TakeWhileIterable<E> extends Iterable<E> {
 
 class TakeWhileIterator<E> extends Iterator<E> {
   final Iterator<E> _iterator;
-  final _ElementPredicate _f;
+  final _ElementPredicate<E> _f;
   bool _isFinished = false;
 
   TakeWhileIterator(this._iterator, bool this._f(E element));
@@ -637,7 +640,7 @@ class SkipIterator<E> extends Iterator<E> {
 
 class SkipWhileIterable<E> extends Iterable<E> {
   final Iterable<E> _iterable;
-  final _ElementPredicate _f;
+  final _ElementPredicate<E> _f;
 
   SkipWhileIterable(this._iterable, bool this._f(E element));
 
@@ -648,7 +651,7 @@ class SkipWhileIterable<E> extends Iterable<E> {
 
 class SkipWhileIterator<E> extends Iterator<E> {
   final Iterator<E> _iterator;
-  final _ElementPredicate _f;
+  final _ElementPredicate<E> _f;
   bool _hasSkipped = false;
 
   SkipWhileIterator(this._iterator, bool this._f(E element));
@@ -713,13 +716,15 @@ class EmptyIterable<E> extends Iterable<E> implements EfficientLength {
 
   Iterable<E> where(bool test(E element)) => this;
 
-  Iterable map(f(E element)) => const EmptyIterable();
+  Iterable/*<T>*/ map/*<T>*/(/*=T*/ f(E element)) => const EmptyIterable();
 
   E reduce(E combine(E value, E element)) {
     throw IterableElementError.noElement();
   }
 
-  fold(var initialValue, combine(var previousValue, E element)) {
+  /*=T*/ fold/*<T>*/(
+      var/*=T*/ initialValue, /*=T*/ combine(
+          var/*=T*/ previousValue, E element)) {
     return initialValue;
   }
 
@@ -737,9 +742,9 @@ class EmptyIterable<E> extends Iterable<E> implements EfficientLength {
 
   Iterable<E> takeWhile(bool test(E element)) => this;
 
-  List toList({ bool growable: true }) => growable ? <E>[] : new List<E>(0);
+  List<E> toList({bool growable: true}) => growable ? <E>[] : new List<E>(0);
 
-  Set toSet() => new Set<E>();
+  Set<E> toSet() => new Set<E>();
 }
 
 /** The always empty iterator. */