don't support virtual onDrawTextOnPath

Bug: skia:7554
Change-Id: Ia8c663918fea7bc91f3474d1c94e7a1c5536a1d4
Reviewed-on: https://skia-review.googlesource.com/149805
Reviewed-by: Florin Malita <fmalita@chromium.org>
Commit-Queue: Mike Reed <reed@google.com>
29 files changed