Add a GrCCPRGeometry file

Enough ccpr-specific geometry code is in flight that it feels like it
should have its own file.

Bug: skia:
Change-Id: I99ef620a7dc35178cf774b3a4ec6159d46f401c7
Reviewed-on: https://skia-review.googlesource.com/39162
Commit-Queue: Chris Dalton <csmartdalton@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
7 files changed