Debugger: remove duplicate heap iterations.

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index cfcc3ec42d867c5c93b5456e119f90a9b974784a..165d7e67e94b26ec3b2d3edf8683a4e77c6be798 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -1194,6 +1194,8 @@ class Object {
   static inline Handle<Object> GetPrototypeSkipHiddenPrototypes(
       Isolate* isolate, Handle<Object> receiver);
 
+  bool HasInPrototypeChain(Isolate* isolate, Object* object);
+
   // Returns the permanent hash code associated with this object. May return
   // undefined if not yet created.
   Object* GetHash();