[elements] Precisely estimate elements size for large-object limits

src/objects-inl.h

Index: src/objects-inl.h
diff --git a/src/objects-inl.h b/src/objects-inl.h
index 6423a17d4144c012dc40a786d6e468398c8aff88..6b50d2b4886fcb7d24e5ed0d59ad6771539f8fa2 100644
--- a/src/objects-inl.h
+++ b/src/objects-inl.h
@@ -2315,9 +2315,8 @@ Handle<Object> FixedArray::get(FixedArray* array, int index, Isolate* isolate) {
   return handle(array->get(index), isolate);
 }
 
-
-bool FixedArray::is_the_hole(int index) {
-  return get(index) == GetHeap()->the_hole_value();
+bool FixedArray::is_the_hole(Isolate* isolate, int index) {
+  return get(index)->IsTheHole(isolate);
 }
 
 
@@ -2388,6 +2387,9 @@ void FixedDoubleArray::set_the_hole(int index) {
   WRITE_UINT64_FIELD(this, offset, kHoleNanInt64);
 }
 
+bool FixedDoubleArray::is_the_hole(Isolate* isolate, int index) {
+  return is_the_hole(index);
+}
 
 bool FixedDoubleArray::is_the_hole(int index) {
   return get_representation(index) == kHoleNanInt64;