Support map in generated dart:html files.

client/html/generated/src/wrapping/_TouchListWrappingImplementation.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.
 
 // WARNING: Do not edit - generated code.
 
 class TouchListWrappingImplementation extends DOMWrapperBase implements TouchList {
   TouchListWrappingImplementation._wrap(ptr) : super._wrap(ptr) {}
 
   int get length() { return _ptr.length; }
@@ skipping 43 matching lines @@
     throw new UnsupportedOperationException("Cannot removeLast on immutable List.");
   }
 
   Touch last() {
     return this[length - 1];
   }
 
   void forEach(void f(Touch element)) {
     _Collections.forEach(this, f);
   }
+ 
+  Collection map(f(Touch element)) {
+    return _Collections.map(this, [], f);
+  }
 
   Collection<Touch> filter(bool f(Touch element)) {
     return _Collections.filter(this, new List<Touch>(), f);
   }
 
   bool every(bool f(Touch element)) {
     return _Collections.every(this, f);
   }
 
   bool some(bool f(Touch element)) {
@@ skipping 21 matching lines @@
   }
 
   Iterator<Touch> iterator() {
     return new _FixedSizeListIterator<Touch>(this);
   }
 
   Touch item(int index) {
     return LevelDom.wrapTouch(_ptr.item(index));
   }
 }