Revert "Implement EGL_ANGLE_iosurface_client_buffer" This reverts commit c7abc08034a30a41748eefc5b628a76d4e2daa8a. Reason for revert: Might have broken Chromium Win10 composition due to validation changes. Original change's description: > Implement EGL_ANGLE_iosurface_client_buffer > > BUG=angleproject:1649 > > Change-Id: I1e72c31d7c9497ad14039a8d3fb97317ab193cb2 > Reviewed-on: https://chromium-review.googlesource.com/559107 > Reviewed-by: Corentin Wallez <cwallez@chromium.org> > Reviewed-by: Geoff Lang <geofflang@chromium.org> > Commit-Queue: Corentin Wallez <cwallez@chromium.org> TBR=geofflang@chromium.org,cwallez@chromium.org Change-Id: I605b710b6d76056d6276b09822cd6ddca277bfd0 No-Presubmit: true No-Tree-Checks: true No-Try: true Bug: angleproject:1649 Reviewed-on: https://chromium-review.googlesource.com/822172 Reviewed-by: Corentin Wallez <cwallez@chromium.org> Commit-Queue: Corentin Wallez <cwallez@chromium.org>