patch via ungoogled-chromium and Fedora. Refactor debian/patches/fixes/gl.patch to make the changed line read
+ glx_image_ = new gl::GLImageGLX(size_, gfx::BufferFormat::BGRX_8888); And rebuild. Proof of concept here: https://build.opensuse.org/package/show/home:stevenpusser:schmonium/chromium
