Revert of Refactoring of CPU NormalMap handling out into its own class

Revert of Refactoring of CPU NormalMap handling out into its own class (patchset #13 id:240001 of https://codereview.chromium.org/2050773002/ )

Reason for revert:
GMs are crashing on Windows Test trybots

Original issue's description:
> SkLightingShader normal vector CPU computation refactor.
> 
> The purpose of this change is to refactor the handling of normal maps out of SkLightingShader, laying the groundwork to eventually allow for multiple normal sources.
> 
> This CL's base was the CL for GPU handling: https://codereview.chromium.org/2043393002/
> 
> What this CL includes:
> 
> - A refactor of the SkLightingShader context's code that deals with reading normals off of a normal map. This is now abstracted out into a NormalSource::Provider class that the context uses.
> 
> BUG=skia:
> GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2050773002
> 
> Committed: https://skia.googlesource.com/skia/+/790a70118327a129cb6b48fabe80f4e184c1e67c

TBR=egdaniel@google.com,reed@google.com
# 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/+/2c80711f90a5dafe3b726bc6562b1e769702c34b

[dvonbeck, 2016-06-27 16:30:10]

The CQ bit was checked by dvonbeck@google.com

[dvonbeck, 2016-06-27 16:30:11]

Created Revert of Refactoring of CPU NormalMap handling out into its own class

[commit-bot: I haz the power, 2016-06-27 16:30:14]

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, 2016-06-27 16:30:21]

Description was changed from

==========
Revert of Refactoring of CPU NormalMap handling out into its own class (patchset
#13 id:240001 of https://codereview.chromium.org/2050773002/ )

Reason for revert:
GMs are crashing on Windows Test trybots

Original issue's description:
> SkLightingShader normal vector CPU computation refactor.
> 
> The purpose of this change is to refactor the handling of normal maps out of
SkLightingShader, laying the groundwork to eventually allow for multiple normal
sources.
> 
> This CL's base was the CL for GPU handling:
https://codereview.chromium.org/2043393002/
> 
> What this CL includes:
> 
> - A refactor of the SkLightingShader context's code that deals with reading
normals off of a normal map. This is now abstracted out into a
NormalSource::Provider class that the context uses.
> 
> BUG=skia:
> GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2050773002
> 
> Committed:
https://skia.googlesource.com/skia/+/790a70118327a129cb6b48fabe80f4e184c1e67c

TBR=egdaniel@google.com,reed@google.com
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:
==========

to

==========
Revert of Refactoring of CPU NormalMap handling out into its own class (patchset
#13 id:240001 of https://codereview.chromium.org/2050773002/ )

Reason for revert:
GMs are crashing on Windows Test trybots

Original issue's description:
> SkLightingShader normal vector CPU computation refactor.
> 
> The purpose of this change is to refactor the handling of normal maps out of
SkLightingShader, laying the groundwork to eventually allow for multiple normal
sources.
> 
> This CL's base was the CL for GPU handling:
https://codereview.chromium.org/2043393002/
> 
> What this CL includes:
> 
> - A refactor of the SkLightingShader context's code that deals with reading
normals off of a normal map. This is now abstracted out into a
NormalSource::Provider class that the context uses.
> 
> BUG=skia:
> GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2050773002
> 
> Committed:
https://skia.googlesource.com/skia/+/790a70118327a129cb6b48fabe80f4e184c1e67c

TBR=egdaniel@google.com,reed@google.com
# 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/+/2c80711f90a5dafe3b726bc6562b1e769702c34b
==========

[commit-bot: I haz the power, 2016-06-27 16:30:22]

Committed patchset #1 (id:1) as
https://skia.googlesource.com/skia/+/2c80711f90a5dafe3b726bc6562b1e769702c34b