Change new List(n) to return fixed length list.

tools/dom/templates/html/impl/impl_Element.darttemplate

Index: tools/dom/templates/html/impl/impl_Element.darttemplate
diff --git a/tools/dom/templates/html/impl/impl_Element.darttemplate b/tools/dom/templates/html/impl/impl_Element.darttemplate
index 3e0080a1f7be6021899ee96906afeb79e430188e..0fa84f447eefe926207bc2841f5a331378d572c8 100644
--- a/tools/dom/templates/html/impl/impl_Element.darttemplate
+++ b/tools/dom/templates/html/impl/impl_Element.darttemplate
@@ -15,8 +15,10 @@ class _ChildrenElementList implements List {
     : _childElements = element.$dom_children,
       _element = element;
 
-  List<Element> toList() {
-    final output = new List<Element>.fixedLength(_childElements.length);
+  List<Element> toList({ bool growable: false }) {
+    final output = growable
+        ? (<Element>[]..length = _childElements.length)

[floitsch, 2013/02/26 13:54:19]

I would prefer an if with 2 lines for the length.

[Lasse Reichstein Nielsen, 2013/02/26 15:26:00]

Done.

+        : new List<Element>(_childElements.length);
     for (int i = 0, len = _childElements.length; i < len; i++) {
       output[i] = _childElements[i];
     }
@@ -312,7 +314,8 @@ class _FrozenElementList implements List {
     return false;
   }
 
-  List<Element> toList() => new List<Element>.from(this);
+  List<Element> toList({ bool growable: false }) =>
+      new List<Element>.from(this, growable: growable);

[floitsch, 2013/02/26 13:54:19]

IterableMixinWorkaround.toListList(this, growable).

   Set<Element> toSet() => new Set<Element>.from(this);
 
   Iterable<Element> take(int n) {