Add EGL extension for WebGPU Bug: angleproject:8476 Change-Id: Ic5aad4eb56239d9346c6ba1f812d070ce85131a1 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/5245895 Reviewed-by: Matthew Denton <mpdenton@chromium.org> Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Commit-Queue: Liza Burakova <liza@chromium.org>