1815775 - [wpt-sync] Sync PR 38422 - vt: Handle transitions in an empty document

Status: RESOLVED FIXED

(Core :: CSS Parsing and Computation, task, P4)

Description

[Web Platform Test Sync Bot [:wpt-sync] (Matrix: #interop:mozilla.org)]

Sync web-platform-tests PR 38422 into mozilla-central (this bug is closed when the sync is complete).

PR: https://github.com/web-platform-tests/wpt/pull/38422
Details from upstream follow.

David Bokan <[e-mail]> wrote:

vt: Handle transitions in an empty document

An iframe can be empty which results in no painted output. In this case,
when performing a view transition the snapshot generating RenderSurface
will be dropped in [1]. However, there's still a transition request
referencing the output of that RenderSurface. This is handled for empty
elements by tracking which elements didn't produce a render pass[2].
However, this list is generated from capture_resource_ids_ which
avoided the root (in a main frame, the root cannot be empty).

[1] https://source.chromium.org/chromium/chromium/src/+/main:cc/trees/draw_property_utils.cc;l=1107;drc=0c4306fc554c80506eb0f9b833a5d2a5fdd452d5
[2] https://source.chromium.org/chromium/chromium/src/+/main:cc/view_transition/view_transition_request.cc;l=118;drc=0c4306fc554c80506eb0f9b833a5d2a5fdd452d5

Bug: 1414069
Change-Id: I05489ee590f43309285e7f54de02b6781891b854
Reviewed-on: https://chromium-review.googlesource.com/4232863
WPT-Export-Revision: a6ffc584e9969795ad85d6e5841ccc7eb9229119

Comment 1

[Web Platform Test Sync Bot [:wpt-sync] (Matrix: #interop:mozilla.org)]

Pushed to try (stability) https://treeherder.mozilla.org/#/jobs?repo=try&revision=60f25e06a9e03ca839da35a3e8758efe5d59de92

Comment 2

[Web Platform Test Sync Bot [:wpt-sync] (Matrix: #interop:mozilla.org)]

CI Results

Ran 9 Firefox configurations based on mozilla-central, and Firefox, Chrome, and Safari on GitHub CI

Total 1 tests

Status Summary

Firefox

TIMEOUT: 1

Chrome

PASS : 1

Safari

TIMEOUT: 1

Links

Gecko CI (Treeherder)
GitHub PR Head
GitHub PR Base

Details

New Tests That Don't Pass

• /css/css-view-transitions/transition-in-empty-iframe.html [wpt.fyi]: TIMEOUT (Chrome: PASS, Safari: TIMEOUT)

Comment 3

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/98a0bc611b7b
[wpt PR 38422] - vt: Handle transitions in an empty document, a=testonly
https://hg.mozilla.org/integration/autoland/rev/904a46f90533
[wpt PR 38422] - Update wpt metadata, a=testonly

Comment 4

[Natalia Csoregi [:nataliaCs]]

https://hg.mozilla.org/mozilla-central/rev/98a0bc611b7b
https://hg.mozilla.org/mozilla-central/rev/904a46f90533