use rasterpipeline for colorfilters

Bug: skia:
Change-Id: Ia0e88f3ae29d026843ac7beb2aee3c891123ce18
Reviewed-on: https://skia-review.googlesource.com/20773
Reviewed-by: Mike Klein <mtklein@google.com>
Commit-Queue: Mike Reed <reed@google.com>
4 files changed