Begin implementation of SkImage_Base::makeColorSpace

BUG=skia:

Change-Id: Idf946faa64dad32a28070a430926a8225dbf6e5a
Reviewed-on: https://skia-review.googlesource.com/9622
Commit-Queue: Matt Sarett <msarett@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
6 files changed