I was using a regex to find VARIABLE (with upper case) so I missed cases where
the macro was not used, but still was an untyped variable.

Bug: v8:6949, v8:9396
Change-Id: I39e3090410b3ac49a4eaaf6fafa32b33ba0f1543
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1800569
Commit-Queue: Santiago Aboy Solanes <solanes@chromium.org>
Reviewed-by: Mythri Alle <mythria@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63730}