Accidentally introduced in:
https://crrev.com/da632baac7e28d370d9893676c8d1d3e901a4400
crrev.com/1652963004

BUG= https://code.google.com/p/v8/issues/detail?id=4203
BUG=427616
TEST=test-asm-validator
R=brucedawson@chromium.org,aseemgarg@chromium.org
LOG=N

Review URL: https://codereview.chromium.org/1795993002

Cr-Commit-Position: refs/heads/master@{#34737}