Fix computeOutputColorSpace

This was accidentally broken when we added a guard for
kIndex_8 (https://skia-review.googlesource.com/c/22721).

Reenable the code for 32 bit color types.

Change-Id: Ibb79a163dc1cffe14e19d2affa17856b549509c4
Reviewed-on: https://skia-review.googlesource.com/23020
Commit-Queue: Mike Reed <reed@google.com>
Reviewed-by: Mike Reed <reed@google.com>
1 file changed