Don't batch circles and circular rrects beyond index limit

BUG=skia:6158, chromium:690144, chromium:688582, chromium:684112

Change-Id: I7a6d1fb73cbe6cb4328848acd153ff2505b5fea2
Reviewed-on: https://skia-review.googlesource.com/8256
Reviewed-by: Florin Malita <fmalita@chromium.org>
Reviewed-by: Robert Phillips <robertphillips@google.com>
Commit-Queue: Jim Van Verth <jvanverth@google.com>
1 file changed