Convert the array iterator protector to a PropertyCell.

src/builtins/arm/builtins-arm.cc

Index: src/builtins/arm/builtins-arm.cc
diff --git a/src/builtins/arm/builtins-arm.cc b/src/builtins/arm/builtins-arm.cc
index 1b9041824b2045ffcd3293ed72f5b119c19618a8..53d5929d54ff39db18a5fbe10606f2fe1ccc6b64 100644
--- a/src/builtins/arm/builtins-arm.cc
+++ b/src/builtins/arm/builtins-arm.cc
@@ -2718,7 +2718,7 @@ static void CheckSpreadAndPushToStack(MacroAssembler* masm) {
   // Check that the ArrayPrototype hasn't been modified in a way that would
   // affect iteration.
   __ LoadRoot(scratch, Heap::kArrayIteratorProtectorRootIndex);
-  __ ldr(scratch, FieldMemOperand(scratch, Cell::kValueOffset));
+  __ ldr(scratch, FieldMemOperand(scratch, PropertyCell::kValueOffset));
   __ cmp(scratch, Operand(Smi::FromInt(Isolate::kProtectorValid)));
   __ b(ne, &runtime_call);