Currently there is GLContext and GLContextEGL which is a sub-class of the former. isEGLContext() exists on the super class, but there are no SPECIALIZE_TYPE_TRAITS defined to be able to downcast to an EGL context.
Created attachment 450761 [details] Patch
Committed r289043 (246750@main): <https://commits.webkit.org/246750@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 450761 [details].
<rdar://problem/88430793>