Improve heuristics for when to use ccpr

Gives the convex and tessellating renderers first claim on larger
paths, and the distance field renderer first claim on complex,
non-volatile paths. This also requires plumbing the clip bounds
through GrPathRenderer::CanDrawPathArgs.

Bug: skia:
Change-Id: I16e1d35ad5ee63251e33f113b1579cbba60456da
Reviewed-on: https://skia-review.googlesource.com/42224
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Chris Dalton <csmartdalton@google.com>
8 files changed