Sync web-platform-tests PR 14611 into mozilla-central (this bug is closed when the sync is complete). PR: https://github.com/web-platform-tests/wpt/pull/14611 Details from upstream follow. Chris Harrelson <chrishtr@chromium.org> wrote: > Move visual overflow computation into the descendant-dependent tree walk. > > Visual overflow is different than layout overflow, and is used in: > * Pre-CAP (aka SPv1) compositing (to determine bounds of composited layers) > * Paint/raster invalidation (to determine whether drawn areas on the > screen change). > > Tested: There were multiple layout or unit tests which failed due to the > absence of each of the parts of this CL. We appear to have quite good > test coverage of this logic. > > Bug: 892347 > > Change-Id: I1fadc5d600bda50992d9aba203319ed2d5059aac > Reviewed-on: https://chromium-review.googlesource.com/1366767 > WPT-Export-Revision: 263b1c0f29d5d5ac05fa9dd893967cf9ed98e95e

Pushed to try https://treeherder.mozilla.org/#/jobs?repo=try&revision=5073074364c7c43a25dda1827435021597ce96f6

Pushed to try https://treeherder.mozilla.org/#/jobs?repo=try&revision=42a15a4cc79ff891bc24b3d345f54a6369e6299d

Pushed to try (stability) https://treeherder.mozilla.org/#/jobs?repo=try&revision=63dc478c9d40bb4114afaf58e4f4547834f58835

Pushed to try https://treeherder.mozilla.org/#/jobs?repo=try&revision=77a57a69ed0ccf672d306afd89bf9c992834b520

Pushed to try (stability) https://treeherder.mozilla.org/#/jobs?repo=try&revision=6195eb7a5f6c4d51ce90dc04b4f63d99b6b6fab2

Pushed to try https://treeherder.mozilla.org/#/jobs?repo=try&revision=82479be475608a235807f34795d57ec54f316a36

Pushed to try (stability) https://treeherder.mozilla.org/#/jobs?repo=try&revision=d947efb344151eca0a42374df34a012ab3969a97

Pushed to try https://treeherder.mozilla.org/#/jobs?repo=try&revision=9c0461cce15db014c148a344b4e79cf79b770fdd

Pushed to try (stability) https://treeherder.mozilla.org/#/jobs?repo=try&revision=fd8e1f5d67848e77471bf2b27496942207e87198

Ran 1 tests PASS : 1

Pushed by james@hoppipolla.co.uk: https://hg.mozilla.org/integration/mozilla-inbound/rev/6d2bb7566727 [wpt PR 14611] - Move visual overflow computation into the descendant-dependent tree walk., a=testonly

Pushed by james@hoppipolla.co.uk: https://hg.mozilla.org/integration/mozilla-inbound/rev/819fa77c9b40 [wpt PR 14611] - Move visual overflow computation into the descendant-dependent tree walk., a=testonly