Emit declarations for typedefs that are needed by reflection.

sdk/lib/_internal/compiler/implementation/enqueue.dart

Index: sdk/lib/_internal/compiler/implementation/enqueue.dart
diff --git a/sdk/lib/_internal/compiler/implementation/enqueue.dart b/sdk/lib/_internal/compiler/implementation/enqueue.dart
index eff52a963ce4d627bbbe0cf6e210b79d5689c973..1034b5de37cf8638507c167932fd37d89ba57e8b 100644
--- a/sdk/lib/_internal/compiler/implementation/enqueue.dart
+++ b/sdk/lib/_internal/compiler/implementation/enqueue.dart
@@ -320,11 +320,12 @@ abstract class Enqueuer {
   /// 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) {
+        compiler.resolver.resolve(element);

[herhut, 2014/07/02 12:26:12]

This code runs both during resolution enqueueing and codegen enqueueing. While
it is probably a noop in the latter case, it still breaks abstractions. How
about

element.ensureResolved(compiler);

which as a sideeffect will resolve it.

[karlklose, 2014/07/02 12:30:31]

Done.

+        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