Lots of frog cleanup

frog/utils.dart

 // Copyright (c) 2011, 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.
 
 // Collection<T> supports most of the ES 5 Array methods, but it's missing
 // map and reduce.
 
 // TODO(jmesserly): we might want a version of this that return an iterable,
 // however JS, Python and Ruby versions are all eager.
 List map(Iterable source, mapper(source)) {
@@ skipping 111 matching lines @@
 /** A copy-on-write [Map] implementation. */
 // TODO(jmesserly): A persistent tree-based implementation of Map would be much
 // nicer. This is just a quick hack to get things working.
 class CopyOnWriteMap<K extends Hashable, V> implements HashMap<K, V> {
   _SharedBackingMap<K, V> _map;
 
   CopyOnWriteMap(): _map = new _SharedBackingMap<K, V>();
   CopyOnWriteMap._wrap(this._map);
   factory CopyOnWriteMap.from(Map<K, V> other) {
     if (other is CopyOnWriteMap<K, V>) {
-      return other.clone();
+      return other.dynamic.clone();
     }
     return new CopyOnWriteMap<K, V>._wrap(
         new _SharedBackingMap<K, V>.from(other));
   }
 
   CopyOnWriteMap<K, V> clone() {
     _map.shared++;
     return new CopyOnWriteMap<K, V>._wrap(_map);
   }
 
@@ skipping 27 matching lines @@
   // Forwarding methods:
   V operator [](K key) => _map[key];
   bool isEmpty() => _map.isEmpty();
   int get length() => _map.length;
   void forEach(void f(K key, V value)) => _map.forEach(f);
   Collection<K> getKeys() => _map.getKeys();
   Collection<V> getValues() => _map.getValues();
   bool containsKey(K key) => _map.containsKey(key);
   bool containsValue(V value) => _map.containsValue(value);
 }