GitLab

This CL ports LayoutButton::BaselinePosition() to
ng_flex_layout_algorithm.cc.

FlexNG's children don't have the last-line baseline values. So we set
BaselineAlgorithmType in NGFlexLayoutAlgorithm::Layout() so that
children provide the last-line baseline as well as the first-line
baseline. PropagateBaselineFromChild() needs to call |NGBoxFragment::
FirstBaseline()| explicitly because button children's Baseline() is
the last-line baselines.

* text-overflow-ellipsis-button-expected.html
  Ellipsis processing in LayoutNG keeps the first letter.

Bug: 1040826
Change-Id: I36402b4fc291d2989c45fb1764202f4fcea91fda
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2300902
Commit-Queue: Kent Tamura <tkent@chromium.org>
Reviewed-by: Ian Kilpatrick <ikilpatrick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#795798}