Avoid rerunning path renderer chain when path known to require sw

Change-Id: If8bdeadf95543917a6e00570b5806a3ee23aa335
Reviewed-on: https://skia-review.googlesource.com/126508
Commit-Queue: Robert Phillips <robertphillips@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>
3 files changed