egl/x11: implement ANGLE_sync_control_rate
Implement EGL_ANGLE_sync_control_rate for running Chromium Linux on Wayland with EGL backend.
Chromium works with this patch using(with videos playing smoothly): /usr/bin/google-chrome-stable --use-gl=egl --enable-features=VaapiVideoDecoder --ignore-gpu-blocklist
Closes #2930 (closed)
Resubmitting work by @kjliew @t.clastres @satmandu in !5139 (closed) and !15381 (closed)
Edited by Yonggang Luo