We are relying in the XBL binding for the shadow host, we need to check
explicitly.
Also, we were checking in_shadow_tree, which is really broad. Just
is_html_slot_element should do, since the rest of the nodes should have only
light tree children.
Bug: 1425759
Reviewed-by: xidorn
MozReview-Commit-ID: KAFRVxaLsK
Browsing context names
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Dont make a network request when the media attribute of a link element is modified
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Add an IndexableText structure for text queries.
Instead of linear search for a node this now uses a HashMap.
Remove the now irrelevant fields from TextDisplayItem.
Include non-upstream metadata changes in WPT sync.
The original sync work excluded changes to metadata files under tests/wpt/mozilla under the assumption that any change in test results indicated an existing intermittent issue. This is incorrect, because these tests rely on shared infrastructure with upstream, so the results can be influenced by syncing.
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Revert previously merged code, better implementation for Default selectionStart and selectionEnd
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