Splitting SVG types out of dart:html.

sdk/lib/html/templates/immutable_list_mixin.darttemplate

   // -- start List<$E> mixins.
   // $E is the element type.
 
   // From Iterable<$E>:
 
   Iterator<$E> iterator() {
     // Note: NodeLists are not fixed size. And most probably length shouldn't
     // be cached in both iterator _and_ forEach method. For now caching it
     // for consistency.
-    return new _FixedSizeListIterator<$E>(this);
+    return new FixedSizeListIterator<$E>(this);
   }
 
   // From Collection<$E>:
 
   void add($E value) {
     throw new UnsupportedError("Cannot add to immutable List.");
   }
 
   void addLast($E value) {
     throw new UnsupportedError("Cannot add to immutable List.");
@@ skipping 51 matching lines @@
   }
 
   void insertRange(int start, int rangeLength, [$E initialValue]) {
     throw new UnsupportedError("Cannot insertRange on immutable List.");
   }
 
   List<$E> getRange(int start, int rangeLength) =>
       _Lists.getRange(this, start, rangeLength, <$E>[]);
 
   // -- end List<$E> mixins.