Reason for revert:
break deps roll
Original issue's description:
> Refactoring of GPU NormalMap handling out into its own class.
>
> 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.
>
> What this CL includes:
>
> - Created a new 'NormalMapFP', out of the existing normal map reading behavior in LightingFP.
>
> - Encapsulates this new fragment processor on a new class NormalMapSource.
>
> - Created a NormalSource abstraction that will interface with SkLightingShader.
>
> - Adapted SkLightingShader to use the normals from its NormalSource field ON THE GPU SIDE. No changes done to the CPU side yet.
>
> BUG=skia:
> GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2043393002
>
> Committed: https://skia.googlesource.com/skia/+/87b0dd00cf9409c5fc990f5d0bb7c0df837f08da
> Committed: https://skia.googlesource.com/skia/+/a7d1e2a57aef2aa4913d4380646d60bbab761318TBR=reed@google.com,dvonbeck@google.com
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:
Review-Url: https://codereview.chromium.org/2068983005
4132de7069