Emit declarations for typedefs that are needed by reflection.

sdk/lib/_internal/compiler/implementation/enqueue.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 dart2js;
 
 typedef ItemCompilationContext ItemCompilationContextCreator();
 
 class EnqueueTask extends CompilerTask {
   final ResolutionEnqueuer resolution;
@@ skipping 296 matching lines @@
       registerStaticUse(ctor.declaration);
     }
   }
 
   /// Enqeue the member [element] if it is required for reflection.
   ///
   /// [enclosingWasIncluded] provides a hint whether the enclosing element was
   /// needed for reflection.
   void enqueueReflectiveMember(Element element, bool enclosingWasIncluded) {
     if (shouldIncludeElementDueToMirrors(element,
-            includedEnclosing: enclosingWasIncluded)
-        // Do not enqueue typedefs.
-        && !element.impliesType) {
+            includedEnclosing: enclosingWasIncluded)) {
       logEnqueueReflectiveAction(element);
-      if (Elements.isStaticOrTopLevel(element)) {
+      if (element.isTypedef) {
+        TypedefElement typedef = element;
+        typedef.ensureResolved(compiler);
+        compiler.world.allTypedefs.add(element);
+      } else if (Elements.isStaticOrTopLevel(element)) {
         registerStaticUse(element.declaration);
       } else if (element.isInstanceMember) {
         // We need to enqueue all members matching this one in subclasses, as
         // well.
         // TODO(herhut): Use TypedSelector.subtype for enqueueing
         Selector selector = new Selector.fromElement(element, compiler);
         registerSelectorUse(selector);
         if (element.isField) {
           Selector selector =
               new Selector.setter(element.name, element.library);
@@ skipping 533 matching lines @@
         }
       }
     });
     return true;
   }
 
   void processWorkItem(void f(WorkItem work), WorkItem work) {
     f(work);
   }
 }