Remove redundant call to TextureD3D::getNativeStorage. BUG=angleproject:1671 Change-Id: I4b13113b41e6d429f771d7a405fd62ef61064c6c Reviewed-on: https://chromium-review.googlesource.com/420853 Reviewed-by: Jamie Madill <jmadill@chromium.org> Commit-Queue: Corentin Wallez <cwallez@chromium.org>