CompressedTexSubImage would disallow 1x1 or 2x2 mips being set for any mip level except 0. This made it impossible to set the data in the lowest mip levels. BUG=angle:623 Change-Id: I623414ae4fd5d6b051579285160296b03fd36486 Reviewed-on: https://chromium-review.googlesource.com/197250Reviewed-by: Shannon Woods <shannonwoods@chromium.org> Reviewed-by: Nicolas Capens <nicolascapens@chromium.org> Tested-by: Geoff Lang <geofflang@chromium.org>
