Fixes for a number of dart analyzer issues in dart:html.

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 html;
 
 // TODO(jacobr): use _Lists.dart to remove some of the duplicated
 // functionality.
 class _ChildrenElementList implements List {
   // Raw Element.
   final Element _element;
   final HtmlCollection _childElements;
 
   _ChildrenElementList._wrap(Element element)
     : _childElements = element.$dom_children,
       _element = element;
 
   List<Element> toList() {
     final output = new List<Element>.fixedLength(_childElements.length);
     for (int i = 0, len = _childElements.length; i < len; i++) {
       output[i] = _childElements[i];
     }
     return output;
   }
 
   Set<Element> toSet() {
-    final output = new Set<Element>(_childElements.length);
+    final output = new Set<Element>();
     for (int i = 0, len = _childElements.length; i < len; i++) {
       output.add(_childElements[i]);
     }
     return output;
   }
 
   bool contains(Element element) => _childElements.contains(element);
 
   void forEach(void f(Element element)) {
     for (Element element in _childElements) {
@@ skipping 165 matching lines @@
     if (result == null) throw new StateError("No elements");
     return result;
   }
 
   Element get single {
     if (length > 1) throw new StateError("More than one element");
     return first;
   }
 
   Element min([int compare(Element a, Element b)]) {
-    return _Collections.minInList(this, compare);
+    return Collections.min(this, compare);
   }
 
   Element max([int compare(Element a, Element b)]) {
-    return _Collections.maxInList(this, compare);
+    return Collections.max(this, compare);
   }
 }
 
 // TODO(jacobr): this is an inefficient implementation but it is hard to see
 // a better option given that we cannot quite force NodeList to be an
 // ElementList as there are valid cases where a NodeList JavaScript object
 // contains Node objects that are not Elements.
 class _FrozenElementList implements List {
   final List<Node> _nodeList;
 
@@ skipping 34 matching lines @@
 
   bool any(bool f(Element element)) {
     for(Element element in this) {
       if (f(element)) {
         return true;
       }
     };
     return false;
   }
 
+  List<Element> toList() => new List<Element>.from(this);
+  Set<Element> toSet() => new Set<Element>.from(this);
+
   List<Element> take(int n) {
     return new ListView<Element>(this, 0, n);
   }
 
-  Iterable<Element> takeWhile(bool test(T value)) {
+  Iterable<Element> takeWhile(bool test(Element value)) {
     return new TakeWhileIterable<Element>(this, test);
   }
 
   List<Element> skip(int n) {
     return new ListView<Element>(this, n, null);
   }
 
-  Iterable<Element> skipWhile(bool test(T value)) {
+  Iterable<Element> skipWhile(bool test(Element value)) {
     return new SkipWhileIterable<Element>(this, test);
   }
 
   Element firstMatching(bool test(Element value), {Element orElse()}) {
     return Collections.firstMatching(this, test, orElse);
   }
 
   Element lastMatching(bool test(Element value), {Element orElse()}) {
     return Collections.lastMatchingInList(this, test, orElse);
   }
@@ skipping 76 matching lines @@
     throw new UnsupportedError('');
   }
 
   Element get first => _nodeList.first;
 
   Element get last => _nodeList.last;
 
   Element get single => _nodeList.single;
 
   Element min([int compare(Element a, Element b)]) {
-    return _Collections.minInList(this, compare);
+    return Collections.min(this, compare);
   }
 
   Element max([int compare(Element a, Element b)]) {
-    return _Collections.maxInList(this, compare);
+    return Collections.max(this, compare);
   }
 }
 
 class _FrozenElementListIterator implements Iterator<Element> {
   final _FrozenElementList _list;
   int _index = -1;
   Element _current;
 
   _FrozenElementListIterator(this._list);
 
@@ skipping 501 matching lines @@
 $if DART2JS
   // Optimization to improve performance until the dart2js compiler inlines this
   // method.
   static dynamic createElement_tag(String tag) =>
       JS('Element', 'document.createElement(#)', tag);
 $else
   static Element createElement_tag(String tag) =>
       document.$dom_createElement(tag);
 $endif
 }