When computing the track sizing of a grid with sub grid items, we should recursively introspect subgrid items and include their children in the sizing computations.
Created attachment 451321 [details] Patch
Created attachment 451970 [details] Patch
Created attachment 451971 [details] Patch for EWS
This patch modifies the imported WPT tests. Please ensure that any changes on the tests (not coming from a WPT import) are exported to WPT. Please see https://trac.webkit.org/wiki/WPTExportProcess
Created attachment 452056 [details] Patch
Created attachment 452075 [details] Patch
<rdar://problem/88991771>
Created attachment 452398 [details] Patch
Comment on attachment 452398 [details] Patch Clearing flags on attachment: 452398 Committed r290077 (247434@trunk): <https://commits.webkit.org/247434@trunk>