Add scrollIntoViewIfNeeded on Dartium.

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;
 
 class _ChildrenElementList extends ListBase<Element> {
   // Raw Element.
   final Element _element;
   final HtmlCollection _childElements;
@@ skipping 773 matching lines @@
    * Note that alignCenter is currently only supported on WebKit platforms. If
    * alignCenter is specified but not supported then this will fall back to
    * alignTop.
    *
    * See also:
    *
    * * [scrollIntoView](http://docs.webplatform.org/wiki/dom/methods/scrollIntoView)
    * * [scrollIntoViewIfNeeded](http://docs.webplatform.org/wiki/dom/methods/scrollIntoViewIfNeeded)
    */
   void scrollIntoView([ScrollAlignment alignment]) {
-    var hasScrollIntoViewIfNeeded = false;
+    var hasScrollIntoViewIfNeeded = true;
 $if DART2JS
     hasScrollIntoViewIfNeeded =
         JS('bool', '!!(#.scrollIntoViewIfNeeded)', this);
 $endif
     if (alignment == ScrollAlignment.TOP) {
       this._scrollIntoView(true);
     } else if (alignment == ScrollAlignment.BOTTOM) {
       this._scrollIntoView(false);
     } else if (hasScrollIntoViewIfNeeded) {
       if (alignment == ScrollAlignment.CENTER) {
@@ skipping 604 matching lines @@
   const ScrollAlignment._internal(this._value);
   toString() => 'ScrollAlignment.$_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');
 }