Add tests for SVG-as-image privacy/security
SVG used an an HTML image should not run script or load
external resources. Verify with WPT.
Bug: 41054640
Change-Id: I717c5531691aefd5867510b03fbcfd25f1c60d72
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5760579
Commit-Queue: Philip Rogers pdr@chromium.org
Commit-Queue: Stephen Chenney schenney@chromium.org
Reviewed-by: Philip Rogers pdr@chromium.org
Cr-Commit-Position: refs/heads/main@{#1337596}