Revert of Repeating SkBitmapProcState rounding bias

Revert of Repeating SkBitmapProcState rounding bias (patchset #6 id:100001 of https://codereview.chromium.org/1529833003/ )

Reason for revert:
We need a SkFractionalInt auto mapper flavor, otherwise we're losing precision for some procs => seaming artifacs

(https://gold.skia.org/diff?test=giantbitmap_mirror_point_rotate&left=0dd7a412fce81586e6a142e039ec2de9&top=a706d4bb2b8e994b936445b87115b07e)

Original issue's description:
> Repeating SkBitmapProcState rounding bias
> 
> Observe the bias in repeat matrix procs also.
> 
> Introduce a utility class to handle device space -> bitmap space
> mapping.
> 
> BUG=skia:4680, skia:4649
> R=reed@google.com
> GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1529833003
> 
> Committed: https://skia.googlesource.com/skia/+/5ae7fdcc3d7712da3193c39a751e88b092aa82db

TBR=reed@google.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:4680, skia:4649
Committed: https://skia.googlesource.com/skia/+/3e6be16e6d4dda6a27f0e1dbfe7c87fecfbf5577

[f(malita), 2015-12-18 17:36:00]

Created Revert of Repeating SkBitmapProcState rounding bias

[commit-bot: I haz the power, 2015-12-18 17:36:08]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1531423003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1531423003/1

[commit-bot: I haz the power, 2015-12-18 17:36:20]

Description was changed from

==========
Revert of Repeating SkBitmapProcState rounding bias (patchset #6 id:100001 of
https://codereview.chromium.org/1529833003/ )

Reason for revert:
We need a SkFractionalInt auto mapper flavor, otherwise we're losing precision
for some procs => seaming artifacs

(https://gold.skia.org/diff?test=giantbitmap_mirror_point_rotate&left=0dd7a412...)

Original issue's description:
> Repeating SkBitmapProcState rounding bias
> 
> Observe the bias in repeat matrix procs also.
> 
> Introduce a utility class to handle device space -> bitmap space
> mapping.
> 
> BUG=skia:4680,skia:4649
> R=reed@google.com
> GOLD_TRYBOT_URL=
https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&is...
> 
> Committed:
https://skia.googlesource.com/skia/+/5ae7fdcc3d7712da3193c39a751e88b092aa82db

TBR=reed@google.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:4680,skia:4649
==========

to

==========
Revert of Repeating SkBitmapProcState rounding bias (patchset #6 id:100001 of
https://codereview.chromium.org/1529833003/ )

Reason for revert:
We need a SkFractionalInt auto mapper flavor, otherwise we're losing precision
for some procs => seaming artifacs

(https://gold.skia.org/diff?test=giantbitmap_mirror_point_rotate&left=0dd7a412...)

Original issue's description:
> Repeating SkBitmapProcState rounding bias
> 
> Observe the bias in repeat matrix procs also.
> 
> Introduce a utility class to handle device space -> bitmap space
> mapping.
> 
> BUG=skia:4680,skia:4649
> R=reed@google.com
> GOLD_TRYBOT_URL=
https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&is...
> 
> Committed:
https://skia.googlesource.com/skia/+/5ae7fdcc3d7712da3193c39a751e88b092aa82db

TBR=reed@google.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:4680,skia:4649

Committed:
https://skia.googlesource.com/skia/+/3e6be16e6d4dda6a27f0e1dbfe7c87fecfbf5577
==========

[commit-bot: I haz the power, 2015-12-18 17:36:21]

Committed patchset #1 (id:1) as
https://skia.googlesource.com/skia/+/3e6be16e6d4dda6a27f0e1dbfe7c87fecfbf5577