Implement revised factories in the VM.

runtime/lib/array.dart

Index: runtime/lib/array.dart
===================================================================
--- runtime/lib/array.dart	(revision 2391)
+++ runtime/lib/array.dart	(working copy)
@@ -2,9 +2,9 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
-class ListFactory {
+class ListFactory<T> {
 
-  factory List<T>.from(Iterable<T> other) {
+  factory List.from(Iterable<T> other) {
     GrowableObjectArray<T> list = new GrowableObjectArray<T>();
     for (final e in other) {
       list.add(e);
@@ -12,7 +12,7 @@
     return list;
   }
 
-  factory List<T>([int length = null]) {
+  factory List([int length = null]) {
     if (length === null) {
       return new GrowableObjectArray<T>();
     } else {
@@ -24,7 +24,7 @@
 // TODO(srdjan): Use shared array implementation.
 class ObjectArray<T> implements List<T> {
 
-  factory ObjectArray<T>(int length) native "ObjectArray_allocate";
+  factory ObjectArray(int length) native "ObjectArray_allocate";
 
   T operator [](int index) native "ObjectArray_getIndexed";
 
@@ -161,7 +161,7 @@
 // the inline cache misses.
 class ImmutableArray<T> implements List<T> {
 
-  factory ImmutableArray<T>._uninstantiable() {
+  factory ImmutableArray._uninstantiable() {
     throw const UnsupportedOperationException(
         "ImmutableArray can only be allocated by the VM");
   }