[skia] convert recipes and module to new context module

[skia] convert recipes and module to new context module

This is a syntax-only change to convert to the new (documented) context
module.

R=borenet@google.com

Bug: skia:
Change-Id: Id907c309d3cf38b85a46f6d8d7ce90ed58ba026f
Reviewed-on: https://skia-review.googlesource.com/16840
Commit-Queue: Eric Boren <borenet@google.com>
Reviewed-by: Eric Boren <borenet@google.com>