Revert of replace SkFixedDiv impl with native 64bit math (patchset #2 id:20001 of https://codereview.chromium.org/1022543003/)

Reason for revert:
http://build.chromium.org/p/tryserver.blink/builders/linux_blink_rel/builds/53096

layouttests failures

Original issue's description:
> replace SkFixedDiv impl with native 64bit math
>
> BUG=skia:
> TBR=
>
> Committed: https://skia.googlesource.com/skia/+/7c44ca926bf42b3b2e56131f250c0fd58f87ac71

TBR=
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:

Review URL: https://codereview.chromium.org/1018523008
2 files changed