Sync web-platform-tests PR 12253 into mozilla-central (this bug is closed when the sync is complete). PR: https://github.com/web-platform-tests/wpt/pull/12253 Details from upstream follow. Rune Lillesveen <firstname.lastname@example.org> wrote: > Don't re-attach ::first-letter during style recalc. > > Update (create or destroy) the FirstLetterPseudoElement and its style > at the point where the block level element's layout sub-tree is up-to- > date. This means we will always attach the layout tree for the > ::first-letter element in Element::AttachLayoutTree, but the pseudo > element and its style may be created/updated at style recalc time, > layout tree rebuild time, or layout tree attachment time depending on > when we know what will be the LayoutText from which we will format the > first letter if any. > > UpdateFirstLetterPseudoElement is split out from UpdatePseudoElement to > make the code easier to read as the former case has some exceptional > cases. > > We no longer use the pseudo style cache for ::first-letter as we will > now compute the style only once per pass with the correct inheritance > parent. > > Bug: 847218 > Change-Id: I7a1e2a60122891fa38998ff85e566bec0a38b513 > > Reviewed-on: https://chromium-review.googlesource.com/1155591 > WPT-Export-Revision: 6cbbd052941276e659b5aedaa162a904984f014e
Component: web-platform-tests → CSS Parsing and Computation
Product: Testing → Core
Pushed to try (stability) https://treeherder.mozilla.org/#/jobs?repo=try&revision=faa962f963665649c329c01b369e0135da9a1b7a
Ran 1 tests PASS : 1
Pushed to try (stability) https://treeherder.mozilla.org/#/jobs?repo=try&revision=4f6e0987025e758ba8092019ed2e34000bf9748c
Pushed by email@example.com: https://hg.mozilla.org/integration/mozilla-inbound/rev/fb7b1227df5b [wpt PR 12253] - Don't re-attach ::first-letter during style recalc., a=testonly
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