Support framesets and frames in remove-context-helper.

[chromium-wpt-export-bot]

I need to test unload deprecation's interaction with framesets.

Bug: 40286851
Change-Id: I3f53d73e5c663b447a238a1ca7497064b9c96ef9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5541148
Commit-Queue: Domenic Denicola <[email protected]>
Reviewed-by: Domenic Denicola <[email protected]>
Auto-Submit: Fergal Daly <[email protected]>
Cr-Commit-Position: refs/heads/main@{#1301100}

[wpt-pr-bot]

The review process for this patch is being conducted in the Chromium project.

[WeizhongX]

WPT Command: python3 ./wpt run --channel=nightly --verify --verify-no-chaos-mode --verify-repeat-loop=0 --verify-repeat-restart=10 --github-checks-text-file=/home/test/artifacts/checkrun.md --affected base_head --log-mach-level=info --log-mach=- -y --no-pause --no-restart-on-unexpected --install-fonts --no-headless --verify-log-full --binary=/home/test/build/firefox/firefox firefox

Some affected tests had inconsistent (flaky) results:

Unstable results

Test | Subtest | Results | Messages -- | -- | -- | -- /html/browsers/browsing-the-web/history-traversal/document-state.https.html |   | OK: 2/10, TIMEOUT: 8/10 |   /html/browsers/browsing-the-web/history-traversal/document-state.https.html | A navigation's initiator origin and referrer are stored in the document state and used on location.reload() | PASS: 2/10, TIMEOUT: 8/10 | Test timed out

These may be pre-existing or new flakes. Please try to reproduce (see the above WPT command, though some flags may not be needed when running locally) and determine if your change introduced the flake. If you are unable to reproduce the problem, please tag @web-platform-tests/wpt-core-team in a comment for help.

[WeizhongX]

This test is flaky on wpt.fyi also: https://wpt.fyi/results/html/browsers/browsing-the-web/history-traversal/document-state.https.html?label=experimental&label=master&aligned

@KyleJu @jcscottiii can you help admin merge?