Use entities in runtime_types

pkg/compiler/lib/src/js_backend/enqueuer.dart

 // 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.
 
 library dart2js.js.enqueue;
 
 import 'dart:collection' show Queue;
 
 import '../common/codegen.dart' show CodegenWorkItem;
 import '../common/tasks.dart' show CompilerTask;
@@ skipping 198 matching lines @@
         applyImpact(listener.registerUsedConstant(constantUse.value));
         _recentConstants = true;
       }
     });
   }
 
   void _registerIsCheck(ResolutionDartType type) {
     _worldBuilder.registerIsCheck(type);
   }
 
-  void _registerClosurizedMember(MemberElement element) {
+  void _registerClosurizedMember(FunctionEntity element) {
     assert(element.isInstanceMember);
     applyImpact(listener.registerClosurizedMember(element));
+    _worldBuilder.registerClosurizedMember(element);

[Siggi Cherem (dart-lang), 2017/05/17 16:14:11]

should "closurized-member" be encoded as part of the impact?

[Johnni Winther, 2017/05/18 08:10:56]

Cannot be done - it's is non-local property:

class C { 
  foo() {}
}
bar() => new C();
baz(o) => o.foo;
main() {
  var c = bar();
  return baz(c);
}

We need the combination of `new C()` and `o.foo` to see that `C.foo` is
closurized.

   }
 
   void forEach(void f(WorkItem work)) {
     do {
       while (_queue.isNotEmpty) {
         // TODO(johnniwinther): Find an optimal process order.
         WorkItem work = _queue.removeLast();
         if (!_processedEntities.contains(work.element)) {
           strategy.processWorkItem(f, work);
           // TODO(johnniwinther): Register the processed element here. This
@@ skipping 56 matching lines @@
     // code for checked setters.
     if (element.isField && element.isInstanceMember) {
       if (!_options.enableTypeAssertions ||
           element.enclosingElement.isClosure) {
         return null;
       }
     }
     return new CodegenWorkItem(_backend, _closedWorld, element);
   }
 }