Moved most of html lib generating scripts into tools.

sdk/lib/html/src/_ListIterators.dart

-// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
-// 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.
-
-part of html;
-
-// Iterator for arrays with fixed size.
-class FixedSizeListIterator<T> extends _VariableSizeListIterator<T> {
-  FixedSizeListIterator(List<T> array)
-      : super(array),
-        _length = array.length;
-
-  bool get hasNext => _length > _pos;
-
-  final int _length;  // Cache array length for faster access.
-}
-
-// Iterator for arrays with variable size.
-class _VariableSizeListIterator<T> implements Iterator<T> {
-  _VariableSizeListIterator(List<T> array)
-      : _array = array,
-        _pos = 0;
-
-  bool get hasNext => _array.length > _pos;
-
-  T next() {
-    if (!hasNext) {
-      throw new StateError("No more elements");
-    }
-    return _array[_pos++];
-  }
-
-  final List<T> _array;
-  int _pos;
-}