D3D9: Use angle::Result error pattern. Bug: angleproject:2752 Change-Id: Ica77969c6e4b8d61d491396a4fd56b0864e4803c Reviewed-on: https://chromium-review.googlesource.com/1163320 Commit-Queue: Jamie Madill <jmadill@chromium.org> Reviewed-by: Yuly Novikov <ynovikov@chromium.org>