Revert "Always use sized internal formats for textures in TextureGL." Causing failures on the Intel and AMD bots which seem to have incorrect rounding for 1-bit alpha formats. This reverts commit 0bcb68f32f5790b0c10913351259fdf4bfed0c28. Change-Id: I00d333b5c10ba3f41d54bec95769f4baf07b0771 Reviewed-on: https://chromium-review.googlesource.com/288206 Reviewed-by: Geoff Lang <geofflang@chromium.org> Tested-by: Geoff Lang <geofflang@chromium.org>