Remove SkImage::MakeTextureFromPixmap

Another step towards reducing the number of texture upload paths.

BUG=skia:

Change-Id: Ica185e7334f52dc9ebf87e21fe6f60589ef87bb3
Reviewed-on: https://skia-review.googlesource.com/7346
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
4 files changed