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

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

Index: tools/dom/templates/html/impl/impl_Node.darttemplate
diff --git a/tools/dom/templates/html/impl/impl_Node.darttemplate b/tools/dom/templates/html/impl/impl_Node.darttemplate
index 74fe51e4e4278c59a4ba3901de62bf0699c76982..d5749c68bd93b4fcb3c141cfa8160a0674ec9a05 100644
--- a/tools/dom/templates/html/impl/impl_Node.darttemplate
+++ b/tools/dom/templates/html/impl/impl_Node.darttemplate
@@ -52,11 +52,11 @@ $else
 $endif
 
   Node min([int compare(Node a, Node b)]) {
-    return _Collections.minInList(this, compare);
+    return Collections.min(this, compare);
   }
 
   Node max([int compare(Node a, Node b)]) {
-    return _Collections.maxInList(this, compare);
+    return Collections.max(this, compare);
   }
 
   void add(Node value) {
@@ -125,6 +125,9 @@ $endif
 
   bool any(bool f(Node element)) => Collections.any(this, f);
 
+  List<Node> toList() => new List<Node>.from(this);
+  Set<Node> toSet() => new Set<Node>.from(this);
+
   bool get isEmpty => this.length == 0;
 
   // From List<Node>: