Fix DCHECK condition in RecordPaintCanvas::push

BUG=1292919

Change-Id: Ief7936d5246b6c5e80d7a0efc8ec19b37bc46e22
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3437569


Reviewed-by: Weiliang Chen <weiliangc@chromium.org>
Commit-Queue: Justin Novosad <junov@chromium.org>
Cr-Commit-Position: refs/heads/main@{#968360}