HTML: Test that removing src attr does not execute script
See https://github.com/whatwg/html/pull/10188/files#r1685905457.
R=jarhar
Change-Id: Ifbade161b3fc7c7e4027d91157f1db37dec50456
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5730135
Reviewed-by: Joey Arhar jarhar@chromium.org
Commit-Queue: Dominic Farolino dom@chromium.org
Cr-Commit-Position: refs/heads/main@{#1332324}