gcGLSpanDynamicExtent is defined in incorrect header, GCGLSpan.h included in wrong order
<rdar://problem/106701929>
Pull request: https://github.com/WebKit/WebKit/pull/11495
Pull request: https://github.com/WebKit/WebKit/pull/12611
Committed 262866@main (97ca174a5ae5): <https://commits.webkit.org/262866@main> Reviewed commits have been landed. Closing PR #12611 and removing active labels.