Use entities in BackendClasses

pkg/compiler/lib/src/native/enqueue.dart

Index: pkg/compiler/lib/src/native/enqueue.dart
diff --git a/pkg/compiler/lib/src/native/enqueue.dart b/pkg/compiler/lib/src/native/enqueue.dart
index 2b804bd44b4f92512f551e872c726a3d235538b9..1711562534628924470ba0b1455e1d2204cf4384 100644
--- a/pkg/compiler/lib/src/native/enqueue.dart
+++ b/pkg/compiler/lib/src/native/enqueue.dart
@@ -450,8 +450,8 @@ abstract class NativeEnqueuerBase implements NativeEnqueuer {
           registerInstantiation(type);
         } else if (type == commonElements.boolType) {
           registerInstantiation(type);
-        } else if (compiler.types.isSubtype(
-            type, backend.backendClasses.listImplementation.rawType)) {
+        } else if (type.asInstanceOf(backend.backendClasses.listClass) !=

[Siggi Cherem (dart-lang), 2017/01/27 16:49:06]

any reason why use `asInstanceOf` and not keep `isSubtype`? we are still using
isSubtype further below.

[Johnni Winther, 2017/01/30 10:00:12]

[asInstanceOf] is sufficient here but not below -- and I need to avoid a warning
about `rawType` acces on [ClassEntity].

They will be aligned in time (i.e. all such queries must go through the
ResolutionWorldBuilder).

+            null) {
           registerInstantiation(type);
         }
         // TODO(johnniwinther): Improve spec string precision to handle type