tree 8b19795aabab39952b9fbaba699601470e4f35a0
parent c6b2e6b061a60f603345e936e6136050da3209aa
author Mike Reed <reed@google.com> 1507560171 -0400
committer Skia Commit-Bot <skia-commit-bot@chromium.org> 1507561474 +0000

add helper to check for overflow

pre-CL to aid in changing the convention for when we overflow

Bug: skia:
Change-Id: I1e34a18fefb80187787a1c0c8ed7ee3516744d24
Reviewed-on: https://skia-review.googlesource.com/57103
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>