Make Dart_FunctionOwner return handles on Types rather than Classes.

runtime/vm/mirrors_api_impl.cc

 // Copyright (c) 2013, 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.
 
 #include "include/dart_mirrors_api.h"
 
 #include "platform/assert.h"
 #include "vm/class_finalizer.h"
 #include "vm/dart.h"
 #include "vm/dart_api_impl.h"
@@ skipping 216 matching lines @@
     // Top-level functions are implemented as members of a hidden class. We hide
     // that class here and instead answer the library.
 #if defined(DEBUG)
     const Library& lib = Library::Handle(owner.library());
     if (lib.IsNull()) {
       ASSERT(owner.IsDynamicClass() || owner.IsVoidClass());
     }
 #endif
     return Api::NewHandle(isolate, owner.library());
   } else {
-    return Api::NewHandle(isolate, owner.raw());
+    return Api::NewHandle(isolate, owner.RareType());
   }
 }
 
 
 DART_EXPORT Dart_Handle Dart_FunctionIsStatic(Dart_Handle function,
                                               bool* is_static) {
   Isolate* isolate = Isolate::Current();
   DARTSCOPE(isolate);
   if (is_static == NULL) {
     RETURN_NULL_ERROR(is_static);
@@ skipping 112 matching lines @@
     RETURN_TYPE_ERROR(isolate, closure, Instance);
   }
 
   ASSERT(ClassFinalizer::AllClassesFinalized());
 
   RawFunction* rf = Closure::function(closure_obj);
   return Api::NewHandle(isolate, rf);
 }
 
 }  // namespace dart