Move path fallback logic into drawer

Change-Id: I6960b775f92b1013e0a826ac6aa1f8464ebf99f8
Reviewed-on: https://skia-review.googlesource.com/145000
Commit-Queue: Herb Derby <herb@google.com>
Reviewed-by: Mike Klein <mtklein@google.com>
Reviewed-by: Jim Van Verth <jvanverth@google.com>
4 files changed