Remove offset from make_colorizer.

We can offset into the color and position arrays by just incrementing
them. We don't need to maintain a separate offset value.

Change-Id: Ic41d5252054f7c167a5b90d3ecef9fd8672fa803
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/458459
Commit-Queue: John Stiles <johnstiles@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
1 file changed