Delete most of SharedImageBackingFactoryIOSurface

This isn't used, and is mostly a copy-paste of
SharedImageBackingFactoryGLTexture.

Bug: 1092155
Change-Id: I57d919afedf074fe786bb213516ca855c888b2bf
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2297745
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: ccameron <ccameron@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#789620}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 3c1224ca73cd3b8242f1fd58f435d738da1642fb
2 files changed