Remove insertRange.

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

 // Copyright (c) 2012, 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 $LIBRARYNAME;
 
 // TODO(jacobr): use _Lists.dart to remove some of the duplicated
 // functionality.
 class _ChildrenElementList extends ListBase<Element> {
   // Raw Element.
@@ skipping 174 matching lines @@
   }
 
   void retainWhere(bool test(Element element)) {
     _childElements.retainWhere(test);
   }
 
   void removeRange(int start, int end) {
     throw new UnimplementedError();
   }
 
-  void insertRange(int start, int rangeLength, [initialValue = null]) {
-    throw new UnimplementedError();
-  }
-
   Iterable getRange(int start, int end)  {
     throw new UnimplementedError();
   }
 
   List sublist(int start, [int end]) {
     if (end == null) end = length;
     return new _FrozenElementList._wrap(Lists.getRange(this, start, end, []));
   }
 
   int indexOf(Element element, [int start = 0]) {
@@ skipping 102 matching lines @@
 
   void setRange(int start, int end, Iterable<Element> iterable,
                 [int skipCount = 0]) {
     throw new UnsupportedError('');
   }
 
   void removeRange(int start, int end) {
     throw new UnsupportedError('');
   }
 
-  void insertRange(int start, int rangeLength, [initialValue = null]) {
-    throw new UnsupportedError('');
-  }
-
   List<Element> sublist(int start, [int end]) {
     return new _FrozenElementList._wrap(_nodeList.sublist(start, end));
   }
 
   void clear() {
     throw new UnsupportedError('');
   }
 
   Element removeAt(int index) {
     throw new UnsupportedError('');
@@ skipping 634 matching lines @@
   const ScrollAlignment._internal(this._value);
   toString() => 'ScrollAlignment.$_value';
 
   /// Attempt to align the element to the top of the scrollable area.
   static const TOP = const ScrollAlignment._internal('TOP');
   /// Attempt to center the element in the scrollable area.
   static const CENTER = const ScrollAlignment._internal('CENTER');
   /// Attempt to align the element to the bottom of the scrollable area.
   static const BOTTOM = const ScrollAlignment._internal('BOTTOM');
 }