- Parse the return type of JS during resolution to know what can be instantiated there.

sdk/lib/_internal/compiler/implementation/resolution/members.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.
 
 part of resolution;
 
 abstract class TreeElements {
   Element operator[](Node node);
   Selector getSelector(Send send);
   DartType getType(Node node);
@@ skipping 1782 matching lines @@
         // We call 'call()' on a Type instance returned from the reference to a
         // class or typedef literal. We do not need to register this call as a
         // dynamic invocation, because we statically know what the target is.
       } else if (!selector.applies(target, compiler)) {
         warnArgumentMismatch(node, target);
       }
 
       if (target != null &&
           target.kind == ElementKind.FOREIGN &&
           selector.name == const SourceString('JS')) {
-        world.nativeEnqueuer.registerJsCall(node, this);
+        world.registerJsCall(node, this);
       }
     }
 
     // TODO(ngeoffray): Warn if target is null and the send is
     // unqualified.
     useElement(node, target);
     registerSend(selector, target);
     if (node.isPropertyAccess) {
       // It might be the closurization of a method.
       world.registerInstantiatedClass(compiler.functionClass);
@@ skipping 1338 matching lines @@
     return e;
   }
 
   /// Assumed to be called by [resolveRedirectingFactory].
   Element visitReturn(Return node) {
     Node expression = node.expression;
     return finishConstructorReference(visit(expression),
                                       expression, expression);
   }
 }