Simply use int64_t instead of int32_t for two local variables.
This avoids integer-overflow in some rare cases.
Bug: chromium:784216
Change-Id: Ie96835d6dc04e338b157469b74ead29e8bd403dd
Reviewed-on: https://webrtc-review.googlesource.com/26580
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Commit-Queue: Henrik Lundin <henrik.lundin@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#21141}