9128   FixedArray* backing_store = FixedArray::cast(elements());  in SetFastElement()  local
9129   if (backing_store->map() == GetHeap()->non_strict_arguments_elements_map()) {  in SetFastElement()
9130     backing_store = FixedArray::cast(backing_store->get(1));  in SetFastElement()
9133     if (!maybe->To(&backing_store)) return maybe;  in SetFastElement()
9135   uint32_t capacity = static_cast<uint32_t>(backing_store->length());  in SetFastElement()
9138       (index >= capacity || backing_store->get(index)->IsTheHole())) {  in SetFastElement()
9215   backing_store->set(index, value);  in SetFastElement()
9810   FixedArray* backing_store = NULL;  in GetElementsCapacityAndUsage()  local
9815       backing_store = FixedArray::cast(backing_store_base);  in GetElementsCapacityAndUsage()
9816       if (backing_store->IsDictionary()) {  in GetElementsCapacityAndUsage()
9818             SeededNumberDictionary::cast(backing_store);  in GetElementsCapacityAndUsage()
9826       backing_store = FixedArray::cast(backing_store_base);  in GetElementsCapacityAndUsage()
9827       *capacity = backing_store->length();  in GetElementsCapacityAndUsage()
9829         if (!backing_store->get(i)->IsTheHole()) ++(*used);  in GetElementsCapacityAndUsage()