When using DMA-BUF for rendering we use a different EGL platform in the UI and Web processes, which might have different extensions and properties, but we are always using only the one used in the UI process.
Pull request: https://github.com/WebKit/WebKit/pull/13231
Committed 263668@main (288d895da13b): <https://commits.webkit.org/263668@main> Reviewed commits have been landed. Closing PR #13231 and removing active labels.