Move processing of instance members from ResolutionEnqueuer to ResolutionWorldBuilderImpl

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

Index: pkg/compiler/lib/src/js_backend/enqueuer.dart
diff --git a/pkg/compiler/lib/src/js_backend/enqueuer.dart b/pkg/compiler/lib/src/js_backend/enqueuer.dart
index 4a4171bce8e0def6333deed86246f0c49f19d923..e51a5fad3e193c6d06568d0bbd332bd4315bcae6 100644
--- a/pkg/compiler/lib/src/js_backend/enqueuer.dart
+++ b/pkg/compiler/lib/src/js_backend/enqueuer.dart
@@ -163,6 +163,10 @@ class CodegenEnqueuer extends EnqueuerImpl {
     return strategy.checkEnqueuerConsistency(this);
   }
 
+  void checkClass(ClassElement cls) {
+    cls.implementation.forEachMember(processInstantiatedClassMember);
+  }
+
   void processInstantiatedClassMember(ClassElement cls, Element member) {
     assert(invariant(member, member.isDeclaration));
     if (isProcessed(member)) return;