Reland "Remove support for copyAsDraw in gpu copySurface."

This reverts commit c5167c053bd58e6afbad83fe493c0231df3f9704.

Reason for revert: fixed

Original change's description:
> Revert "Remove support for copyAsDraw in gpu copySurface."
>
> This reverts commit 6565506463db042d3d543a1707f473cdf1ef4e9e.
>
> Reason for revert: seems to break things?
>
> Original change's description:
> > Remove support for copyAsDraw in gpu copySurface.
> >
> > The major changes on a higher lever are:
> > 1) The majority of all copies now go through GrSurfaceProxy::Copy which
> > takes in a proxy and returns a new one with the data copied to it. This
> > is the most common use case within Ganesh.
> >
> > 2) The backend copy calls no longer do draws, require origins to be the
> > same, and won't do any swizzling or adjustment of subrects. They are
> > all implemented to be dumb copy this data to this other spot.
> >
> > 3) The GrSurfaceContext copy call has now been moved to priv and renamed
> > copyNoDraw, and a new priv copyAsDraw was added to GrRenderTargetContext.
> >
> > 4) WritePixels and ReplaceRenderTarget both need to specifiy the destination
> > of copies. They are the only users (besides the GrSurfaceProxy::Copy) which
> > call the priv methods on GrSurfaceContext.
> >
> > Change-Id: Iaf1eb3a73ccaf39a75af77e281dae594f809186f
> > Reviewed-on: https://skia-review.googlesource.com/c/skia/+/217459
> > Reviewed-by: Brian Salomon <bsalomon@google.com>
> > Commit-Queue: Greg Daniel <egdaniel@google.com>
>
> TBR=egdaniel@google.com,bsalomon@google.com,robertphillips@google.com
>
> Change-Id: Id43aa8aa1451e794342e930441d9975b90e6b59f
> No-Presubmit: true
> No-Tree-Checks: true
> No-Try: true
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/218549
> Reviewed-by: Greg Daniel <egdaniel@google.com>
> Commit-Queue: Greg Daniel <egdaniel@google.com>

TBR=egdaniel@google.com,bsalomon@google.com,robertphillips@google.com

Change-Id: I1a96f85ae2ff7622a6b57406755d478e7fbcf56e
No-Presubmit: true
No-Tree-Checks: true
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/218797
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Greg Daniel <egdaniel@google.com>
diff --git a/src/gpu/GrContextPriv.cpp b/src/gpu/GrContextPriv.cpp
index 7945192..a311de0 100644
--- a/src/gpu/GrContextPriv.cpp
+++ b/src/gpu/GrContextPriv.cpp
@@ -16,6 +16,7 @@
 #include "src/gpu/GrMemoryPool.h"
 #include "src/gpu/GrRenderTargetContext.h"
 #include "src/gpu/GrSurfacePriv.h"
+#include "src/gpu/GrSurfaceContextPriv.h"
 #include "src/gpu/GrTextureContext.h"
 #include "src/gpu/SkGr.h"
 #include "src/gpu/effects/generated/GrConfigConversionEffect.h"