missed a place to clamp

We have a fast path where we can use a memset for constant colors.
That wasn't being gamut-clamped until now.

Some refactoring to allow append_color_pipeline() to be called
without a this pointer.

Change-Id: I8a10e537d579235e80633a5e480f1e38c7932014
Reviewed-on: https://skia-review.googlesource.com/152583
Commit-Queue: Mike Klein <mtklein@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
Auto-Submit: Mike Klein <mtklein@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
1 file changed