Fix type on _Collections.map; Fix removal of native file.

client/dom/scripts/template_frog_dom.darttemplate

 // 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.
 
 // DO NOT EDIT
 // Auto-generated Dart DOM library.
 
 #library("dom");
-#native("dom_frog.js");
 
 $!GENERATED_DART_FILES
 #source('src/EventListener.dart');
 #source('src/KeyLocation.dart');
 #source('src/KeyName.dart');
 #source('src/RequestAnimationFrameCallback.dart');
 #source('src/TimeoutHandler.dart');
 #source('src/_Collections.dart');
 // #source('src/_FactoryProviders.dart');
 #source('src/_ListIterators.dart');
 #source('src/_Lists.dart');
 
 // TODO(jmesserly): 'native' here is aWork-around for Frog bug.  Frog needs to
 // be smarter about inheriting from a hidden native type (in this case
 // DOMWindow)
 class Window extends DOMWindow native "*Window" {}
 DOMWindow get window() native "return window;";
 // TODO(vsm): Revert to Dart method when 508 is fixed.
 HTMLDocument get document() native "return window.document;";