Fix a bunch of issues with 'hidden' DOM types.

frog/member.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.
 
 /** A formal parameter to a [Method]. */
 class Parameter {
   FormalNode definition;
   Member method;
 
   String name;
@@ skipping 958 matching lines @@
         }
       } else if (name == 'isEmpty') {
         if (target is ConstListValue || target is ConstMapValue) {
           code = '${target.dynamic.values.isEmpty()}';
         }
       }
     }
 
     // TODO(jmesserly): factor this better
     if (name == 'get\$typeName' && declaringType.library == world.dom) {
-      world.gen.corejs.useTypeNameOf = true;
+      world.gen.corejs.ensureTypeNameOf();
     }
 
     return new Value(inferredResult, code, node.span);
   }
 
   Value _invokeConstructor(MethodGenerator context, Node node,
       Value target, Arguments args, argsString) {
     declaringType.markUsed();
 
     if (!target.isType) {
@@ skipping 692 matching lines @@
   }
 
   void forEach(void f(Member member)) {
     factories.forEach((_, Map constructors) {
       constructors.forEach((_, Member member) {
         f(member);
       });
     });
   }
 }