Convert the array iterator protector to a PropertyCell.

src/builtins/mips/builtins-mips.cc

Index: src/builtins/mips/builtins-mips.cc
diff --git a/src/builtins/mips/builtins-mips.cc b/src/builtins/mips/builtins-mips.cc
index 9ffdec0b5f61a0cdea99f2c1a2fd51002497de3c..d36d445534e73009524327836aa1fa140fcfe56a 100644
--- a/src/builtins/mips/builtins-mips.cc
+++ b/src/builtins/mips/builtins-mips.cc
@@ -2728,7 +2728,7 @@ static void CheckSpreadAndPushToStack(MacroAssembler* masm) {
   // Check that the ArrayPrototype hasn't been modified in a way that would
   // affect iteration.
   __ LoadRoot(scratch, Heap::kArrayIteratorProtectorRootIndex);
-  __ lw(scratch, FieldMemOperand(scratch, Cell::kValueOffset));
+  __ lw(scratch, FieldMemOperand(scratch, PropertyCell::kValueOffset));
   __ Branch(&runtime_call, ne, scratch,
             Operand(Smi::FromInt(Isolate::kProtectorValid)));