This will mainly fix build issues introduced by r295410 (251416@main) due to missing headers in the new SystemFontDatabaseGTK.cpp source file.
Pull request: https://github.com/WebKit/WebKit/pull/1459
Committed r295474 (251479@main): <https://commits.webkit.org/251479@main> Reviewed commits have been landed. Closing PR #1459 and removing active labels.
<rdar://problem/94884182>