Remove unused Options parameter from SkImageGenerator::getPixels

I'd like to remove this from the virtual onGetPixels as well, but that
requires staging a chromium change.

Bug: skia:
Change-Id: I078e5135daaa77803d8474027a98da2973556afb
Reviewed-on: https://skia-review.googlesource.com/c/159522
Commit-Queue: Brian Osman <brianosman@google.com>
Commit-Queue: Mike Klein <mtklein@google.com>
Reviewed-by: Mike Klein <mtklein@google.com>
Auto-Submit: Brian Osman <brianosman@google.com>
3 files changed