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

src/elements.cc

Index: src/elements.cc
diff --git a/src/elements.cc b/src/elements.cc
index 6814197662e771a2ce9454ff12726763aa87c3af..ee72806b535761291297d1cfc020f0b671d150cb 100644
--- a/src/elements.cc
+++ b/src/elements.cc
@@ -1256,7 +1256,7 @@ class DictionaryElementsAccessor
     DisallowHeapAllocation no_gc;
     SeededNumberDictionary* dict = SeededNumberDictionary::cast(store);
     Object* index = dict->KeyAt(entry);
-    return !index->IsTheHole();
+    return !index->IsTheHole(dict->GetIsolate());
   }
 
   static uint32_t GetIndexForEntryImpl(FixedArrayBase* store, uint32_t entry) {
@@ -1820,7 +1820,7 @@ class FastElementsAccessor : public ElementsAccessorBase<Subclass, KindTraits> {
     }
     Subclass::SetLengthImpl(isolate, receiver, new_length, backing_store);
 
-    if (IsHoleyElementsKind(kind) && result->IsTheHole()) {
+    if (IsHoleyElementsKind(kind) && result->IsTheHole(isolate)) {
       return isolate->factory()->undefined_value();
     }
     return result;
@@ -2427,7 +2427,7 @@ class SloppyArgumentsElementsAccessor
     uint32_t length = parameter_map->length() - 2;
 
     for (uint32_t i = 0; i < length; ++i) {
-      if (parameter_map->get(i + 2)->IsTheHole()) continue;
+      if (parameter_map->get(i + 2)->IsTheHole(isolate)) continue;
       if (convert == GetKeysConversion::kConvertToString) {
         Handle<String> index_string = isolate->factory()->Uint32ToString(i);
         list->set(insertion_index, *index_string);