Make List.from and Iterable.toList default to not growable.

tools/dom/templates/html/impl/impl_Node.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;
 
 /**
  * Lazy implementation of the child nodes of an element that does not request
  * the actual child nodes of an element until strictly necessary greatly
  * improving performance for the typical cases where it is not required.
@@ skipping 145 matching lines @@
   }
 
   Iterable expand(Iterable f(Node element)) {
     return IterableMixinWorkaround.expand(this, f);
   }
 
   bool every(bool f(Node element)) => IterableMixinWorkaround.every(this, f);
 
   bool any(bool f(Node element)) => IterableMixinWorkaround.any(this, f);
 
-  List<Node> toList({ bool growable: false }) =>
+  List<Node> toList({ bool growable: true }) =>
       new List<Node>.from(this, growable: growable);
   Set<Node> toSet() => new Set<Node>.from(this);
 
   bool get isEmpty => this.length == 0;
 
   // From List<Node>:
 
   Iterable<Node> take(int n) {
     return IterableMixinWorkaround.takeList(this, n);
   }
@@ skipping 109 matching lines @@
       final Node parent = this.parentNode;
       parent.$dom_replaceChild(otherNode, this);
     } catch (e) {
 
     };
     return this;
   }
 
 $!MEMBERS
 }