TextureD3D: Mark images clean after binding a surface. By marking the images as dirty after binding a surface, the surface would be cleared when it was first read or written to. BUG=750813 BUG=angleproject:1635 Change-Id: Ic0d1c985151d55a0f1a1af67bb1edc4b0e8f2063 Reviewed-on: https://chromium-review.googlesource.com/598731 Commit-Queue: Geoff Lang <geofflang@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org>