D3D11 requires us to NULL the update region parameter when updating
depth stencil textures. For these textures, we can't always use the
subdata workaround, so disable it entirely for these textures.

BUG=angle:729
BUG=365078

Change-Id: I44258dd1b8937b1aebcb3a73de835698805537e0
Reviewed-on: https://chromium-review.googlesource.com/222911Tested-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>