Update SkClipStack's bound computation

I believe this was originally added to make Raster & GPU rendering more similar. I think we've moved on from there.

Change-Id: Ic980f3308fbd427e5857b720488c91383a32a149
Reviewed-on: https://skia-review.googlesource.com/30761
Reviewed-by: Stan Iliev <stani@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
1 file changed