Check the trace-coordinate in SkRP when debug traces are enabled.

This CL adds a new boolean to MakeRasterPipelineProgram to enable
trace-op writing. When this is passed, we generate a trace mask at
the start of the program. (This mask isn't used anywhere yet.)

Change-Id: Ifb8f13d8d793decfc35bcff4668cc5efab088fa0
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/661216
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: John Stiles <johnstiles@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
12 files changed