Explicitly declare temporary cooked frames state

src/top.cc

Index: src/top.cc
diff --git a/src/top.cc b/src/top.cc
index 3efd1fc80e27efd0d11910dda24976e332180702..0fcf4586674d2ede50834bc36357a8937002afd1 100644
--- a/src/top.cc
+++ b/src/top.cc
@@ -88,6 +88,17 @@ char* Top::Iterate(ObjectVisitor* v, char* thread_storage) {
 }
 
 
+void Top::IterateThread(ThreadVisitor* v) {
+  v->VisitThread(&thread_local_);
+}
+
+
+void Top::IterateThread(ThreadVisitor* v, char* t) {
+  ThreadLocalTop* thread = reinterpret_cast<ThreadLocalTop*>(t);
+  v->VisitThread(thread);
+}
+
+
 void Top::Iterate(ObjectVisitor* v, ThreadLocalTop* thread) {
   v->VisitPointer(&(thread->pending_exception_));
   v->VisitPointer(&(thread->pending_message_obj_));