Introduce IsUndefined(Isolate*) and IsTheHole(Isolate*)

src/heap/objects-visiting.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/heap/objects-visiting.h"
 
 #include "src/heap/mark-compact-inl.h"
 #include "src/heap/objects-visiting-inl.h"
 
 namespace v8 {
@@ skipping 194 matching lines @@
         // Subsequent elements in the list.
         DCHECK(tail != NULL);
         WeakListVisitor<T>::SetWeakNext(tail, retained);
         if (record_slots) {
           Object** next_slot =
               HeapObject::RawField(tail, WeakListVisitor<T>::WeakNextOffset());
           collector->RecordSlot(tail, next_slot, retained);
         }
       }
       // Retained object is new tail.
-      DCHECK(!retained->IsUndefined());
+      DCHECK(!retained->IsUndefined(heap->isolate()));
       candidate = reinterpret_cast<T*>(retained);
       tail = candidate;
 
       // tail is a live object, visit it.
       WeakListVisitor<T>::VisitLiveObject(heap, tail, retainer);
 
     } else {
       WeakListVisitor<T>::VisitPhantomObject(heap, candidate);
     }
 
@@ skipping 130 matching lines @@
 };
 
 
 template Object* VisitWeakList<Context>(Heap* heap, Object* list,
                                         WeakObjectRetainer* retainer);
 
 template Object* VisitWeakList<AllocationSite>(Heap* heap, Object* list,
                                                WeakObjectRetainer* retainer);
 }  // namespace internal
 }  // namespace v8