Switch TimeDelta::operator/(TimeDelta) to return double.

Renames FltDiv() back to operator/() and changes some remaining IntDiv()
callers to ClampFloor( operator/() ).

Bug: 1104532
Change-Id: I5acabb3d6ad1e9b0183728a884b69416849ba713
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2281203
Commit-Queue: Peter Kasting <pkasting@chromium.org>
Reviewed-by: Scott Violet <sky@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#794413}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 411c9250f4f1d06d6c2868b39e956396c5eee8e2
1 file changed