Rebaseline and unskip imported/w3c/web-platform-tests/FileAPI/url/sandboxed-iframe.html
Pull request: https://github.com/WebKit/WebKit/pull/3330
Committed 253468@main (d7762d65dcd1): <https://commits.webkit.org/253468@main> Reviewed commits have been landed. Closing PR #3330 and removing active labels.
<rdar://problem/98723604>