Revert of It is dangerous to ignore SkRect::intersect's return value (patchset #6...

Revert of It is dangerous to ignore SkRect::intersect's return value (patchset #6 id:100001 of https://codereview.chromium.org/833943002/)

Reason for revert:
Still more Chromium clean up to do

Original issue's description:
> It is dangerous to ignore SkRect::intersect's return value
>
> Committed: https://skia.googlesource.com/skia/+/152f524fd325b7776b01f84afbfe2fa071648a05

TBR=reed@google.com
NOTREECHECKS=true
NOTRY=true

Review URL: https://codereview.chromium.org/825983005