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b5c8164e99
- Remove the last remaining Servo-specific PseudoElement enum from layout. This was made to select `::before` and `::after` (both eager pseudo-elements), but now `traverse_pseudo_element` is called `traverse_eager_pseudo_element` and should work on any eager pseudo element. - Expose a single way of getting psuedo-element variants of ThreadSafeLayoutElement in the Layout DOM, which returns `None` when the pseudo-element doesn't apply (not defined for eager pseudo-elements or when trying to get `<details>` related pseudo-elements on elements that they don't apply to). - Ensure that NodeAndStyleInfo always refers to a node. This is done by making sure that anonymous boxes are all associated with their originating node. These changes are prepatory work for implementation of the `::marker` pseudo-element as well as ensuring that all anonymous boxes can be cached into the box tree eventually. Signed-off-by: Martin Robinson <mrobinson@igalia.com>