Clean up some legacy shader context code
The base class returns nullptr, so no need for various derived classes
to do the same thing.
A bigger simplification is that SkPictureShader doesn't need to create a
custom context class that just acts as a pass-through to an image shader
context - just return the image shader context directly.
Auto-Submit: Brian Osman <email@example.com>
Commit-Queue: Brian Osman <firstname.lastname@example.org>
Reviewed-by: Kevin Lubick <email@example.com>
Commit-Queue: Kevin Lubick <firstname.lastname@example.org>
5 files changed