Convert the array iterator protector to a PropertyCell.

src/isolate-inl.h

Index: src/isolate-inl.h
diff --git a/src/isolate-inl.h b/src/isolate-inl.h
index fc88676823d8ab8875a657e3dae0bfd710072e6d..fe4f92080db1bad052f6fbafd5a584e1a49e37a2 100644
--- a/src/isolate-inl.h
+++ b/src/isolate-inl.h
@@ -139,22 +139,22 @@ bool Isolate::IsHasInstanceLookupChainIntact() {
 }
 
 bool Isolate::IsStringLengthOverflowIntact() {
-  PropertyCell* has_instance_cell = heap()->string_length_protector();
-  return has_instance_cell->value() == Smi::FromInt(kProtectorValid);
+  PropertyCell* string_length_cell = heap()->string_length_protector();
+  return string_length_cell->value() == Smi::FromInt(kProtectorValid);
 }
 
 bool Isolate::IsFastArrayIterationIntact() {
-  Cell* fast_iteration = heap()->fast_array_iteration_protector();
-  return fast_iteration->value() == Smi::FromInt(kProtectorValid);
+  Cell* fast_iteration_cell = heap()->fast_array_iteration_protector();
+  return fast_iteration_cell->value() == Smi::FromInt(kProtectorValid);
 }
 
 bool Isolate::IsArrayBufferNeuteringIntact() {
-  PropertyCell* fast_iteration = heap()->array_buffer_neutering_protector();
-  return fast_iteration->value() == Smi::FromInt(kProtectorValid);
+  PropertyCell* buffer_neutering = heap()->array_buffer_neutering_protector();
+  return buffer_neutering->value() == Smi::FromInt(kProtectorValid);
 }
 
 bool Isolate::IsArrayIteratorLookupChainIntact() {
-  Cell* array_iterator_cell = heap()->array_iterator_protector();
+  PropertyCell* array_iterator_cell = heap()->array_iterator_protector();
   return array_iterator_cell->value() == Smi::FromInt(kProtectorValid);
 }