composecolorfilter can now append stages

Bug: skia:
Change-Id: I46b54e5fd09de16b467142a5501b226273182d52
Reviewed-on: https://skia-review.googlesource.com/15615
Reviewed-by: Mike Klein <mtklein@chromium.org>
Commit-Queue: Mike Reed <reed@google.com>
1 file changed