[Tracking Requested - why for this release]: Important printing regression.

Cloning of the nested documents should be recursive, I am dum dum.

Backed out changeset 6645926d8c62 (bug 1663283) for web platform test failures in /html/browsers/windows/iframe-nested-print.html. CLOSED TREE

Log:
https://treeherder.mozilla.org/logviewer.html#/jobs?job_id=314955351&repo=autoland&lineNumber=1534

Push with failures:
https://treeherder.mozilla.org/#/jobs?repo=autoland&group_state=expanded&revision=6645926d8c62be62871dcda272858df545cbd941

Backout:
https://hg.mozilla.org/integration/autoland/rev/5a77c0b857048d46fe4bced46b2234b49dcc84a2

This was because bug 1662259 landed right before this, and broke printing nested iframes in a different way, sigh.

Yay tests, though.

https://hg.mozilla.org/mozilla-central/rev/03c8a99d44e3

Comment on attachment 9174072 [details]
Bug 1663283 - Fix printing of nested iframes. r=smaug,jwatt

Beta/Release Uplift Approval Request

• User impact if declined: nested iframes don't print
• Is this code covered by automated tests?: Yes
• Has the fix been verified in Nightly?: Yes
• Needs manual test from QE?: Yes
• If yes, steps to reproduce: open attachment in the bug, ctrl + P
• List of other uplifts needed: Bug 1663140
• Risk to taking this patch: Low
• Why is the change risky/not risky? (and alternatives if risky): simple change to make a chunk of code recursive.
• String changes made/needed: none

Comment on attachment 9174072 [details]
Bug 1663283 - Fix printing of nested iframes. r=smaug,jwatt

Approved for 81.0b8.

https://hg.mozilla.org/releases/mozilla-beta/rev/527df796af59

Hello,

Confirming this as verified fixed on 82.0a1 (2020-09-20) and 81.0 - pref'd on. Confirmed using Windows 10x64, macOS 10.15 and Ubuntu 20.