restore bool version of clip-bounds

BUG=skia:

Change-Id: I94e35566cf5bcd250515c71a566dd79030e2acb4
Reviewed-on: https://skia-review.googlesource.com/7430
Reviewed-by: Florin Malita <fmalita@chromium.org>
Commit-Queue: Mike Reed <reed@google.com>
3 files changed