Currently WebXR code doesn't build with ANGLE enabled due to assuming that USE(OPENGL_ES) applies to the WebGL context even when USE(ANGLE) is defined.
Created attachment 448928 [details] Patch
Comment on attachment 448928 [details] Patch LGTM, great! :-)
Committed r287923 (245956@main): <https://commits.webkit.org/245956@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 448928 [details].
<rdar://problem/87456823>