Turns out that the method wasn't added to the polyfill's definition of XRWebGLLayerand the polyfill was also breaking native implementations by shimming the XRWebGLLayer constructor to account for Chrome 76/77 compatibility issues (now no longer available).
Turns out that the method wasn't added to the polyfill's definition of
XRWebGLLayerand the polyfill was also breaking native implementations by shimming theXRWebGLLayerconstructor to account for Chrome 76/77 compatibility issues (now no longer available).