Add SkImage_Base::onMakeColorSpace() stub

BUG=skia:

Change-Id: I103ea172a4874bc2a9f644caa406da7afe94aa1c
Reviewed-on: https://skia-review.googlesource.com/9451
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Matt Sarett <msarett@google.com>
1 file changed