Ensure interfaces are loaded.

dart/lib/compiler/implementation/enqueue.dart

Index: dart/lib/compiler/implementation/enqueue.dart
diff --git a/dart/lib/compiler/implementation/enqueue.dart b/dart/lib/compiler/implementation/enqueue.dart
index b2ff2a0985dfcb9c952f669c548a925e7eeb745a..58dc86956178469570a167358ad3f74054fe691b 100644
--- a/dart/lib/compiler/implementation/enqueue.dart
+++ b/dart/lib/compiler/implementation/enqueue.dart
@@ -208,9 +208,9 @@ class Enqueuer {
       while (cls !== null) {
         if (seenClasses.contains(cls)) return;
         seenClasses.add(cls);
-        // TODO(ahe): Don't call resolveType, instead, call this method
-        // when resolveType is called.
-        compiler.resolveClass(cls);
+        // TODO(ahe): Don't call ensureResolved, instead, call this method
+        // from the resolver.
+        cls.ensureResolved(compiler);
         cls.members.forEach(processInstantiatedClassMember);
         cls = cls.superclass;
       }