Revert of add cast for tostring

Revert of add cast for tostring (patchset #1 id:1 of https://codereview.chromium.org/2385353002/ )

Reason for revert:
base CL has legacy skp bug, so have to revert it

Original issue's description:
> add cast for tostring to fix google3
> 
> BUG=skia:
> GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2385353002
> 
> TBR=True
> NOTRY=True
> 
> Committed: https://skia.googlesource.com/skia/+/4cfd5af26e5fab1699cfa2ab40d49c24cededd72

TBR=
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:

Committed: https://skia.googlesource.com/skia/+/418374c0d27280f3a1161601ae5fab28a76a0d3c

[reed1, 2016-10-03 21:33:38]

The CQ bit was checked by reed@google.com

[reed1, 2016-10-03 21:33:38]

Created Revert of add cast for tostring

[commit-bot: I haz the power, 2016-10-03 21:33:44]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-10-03 21:33:50]

Description was changed from

==========
Revert of add cast for tostring (patchset #1 id:1 of
https://codereview.chromium.org/2385353002/ )

Reason for revert:
base CL has legacy skp bug, so have to revert it

Original issue's description:
> add cast for tostring to fix google3
> 
> BUG=skia:
> GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2385353002
> 
> TBR=True
> NOTRY=True
> 
> Committed:
https://skia.googlesource.com/skia/+/4cfd5af26e5fab1699cfa2ab40d49c24cededd72

TBR=
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:
==========

to

==========
Revert of add cast for tostring (patchset #1 id:1 of
https://codereview.chromium.org/2385353002/ )

Reason for revert:
base CL has legacy skp bug, so have to revert it

Original issue's description:
> add cast for tostring to fix google3
> 
> BUG=skia:
> GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2385353002
> 
> TBR=True
> NOTRY=True
> 
> Committed:
https://skia.googlesource.com/skia/+/4cfd5af26e5fab1699cfa2ab40d49c24cededd72

TBR=
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:

Committed:
https://skia.googlesource.com/skia/+/418374c0d27280f3a1161601ae5fab28a76a0d3c
==========

[commit-bot: I haz the power, 2016-10-03 21:33:50]

Committed patchset #1 (id:1) as
https://skia.googlesource.com/skia/+/418374c0d27280f3a1161601ae5fab28a76a0d3c