Put metadata fields in their owner class.

runtime/vm/class_finalizer.cc

Index: runtime/vm/class_finalizer.cc
diff --git a/runtime/vm/class_finalizer.cc b/runtime/vm/class_finalizer.cc
index 9e90e410515ed048e2e481eb1ff739f91e3d5c29..d5b2fdb662431f06116974f0a7d8510171264f13 100644
--- a/runtime/vm/class_finalizer.cc
+++ b/runtime/vm/class_finalizer.cc
@@ -2289,7 +2289,6 @@ void ClassFinalizer::FinalizeTypesInClass(const Class& cls) {
     // This class should not contain any fields or functions yet, because it has
     // not been compiled yet. Since 'ResolveAndFinalizeMemberTypes(cls)' has not
     // been called yet, unfinalized member types could choke the snapshotter.
-    ASSERT(Array::Handle(cls.fields()).Length() == 0);

[rmacnak, 2014/05/08 01:35:21]

This assert no longer holds because we can have metadata before the class is
fully compiled.  Put a bit in Field marking it as a metadata field and assert
only metadata fields here?

     ASSERT(Array::Handle(cls.functions()).Length() == 0);
   }
 }