Revert "Revert "Revert "Revert "Remove GrBackendRenderTargetDesc in favor of GrBackendRenderTarget.""""

This reverts commit 6df4d6be0d025211400de6a910e17f2a87219887.

Reason for revert: Google3 fix landed

Original change's description:
> Revert "Revert "Revert "Remove GrBackendRenderTargetDesc in favor of GrBackendRenderTarget."""
> 
> This reverts commit 71554bc256b705fe959b7aa2fb2f24ed48782362.
> 
> Reason for revert: Google3
> 
> Original change's description:
> > Revert "Revert "Remove GrBackendRenderTargetDesc in favor of GrBackendRenderTarget.""
> > 
> > This reverts commit 807371c15bd742efb98a9df6e1dee73e8bda8af5.
> > 
> > Docs-Preview: https://skia.org/?cl=40260
> > Change-Id: I28e0434c455155ff39a5aaa4141abdf442474e87
> > Reviewed-on: https://skia-review.googlesource.com/40260
> > Reviewed-by: Greg Daniel <egdaniel@google.com>
> > Commit-Queue: Brian Salomon <bsalomon@google.com>
> 
> TBR=egdaniel@google.com,bsalomon@google.com
> 
> Change-Id: Ifdfa896a70db69935473276d12dce54de5c6b6f7
> No-Presubmit: true
> No-Tree-Checks: true
> No-Try: true
> Reviewed-on: https://skia-review.googlesource.com/41500
> Reviewed-by: Brian Salomon <bsalomon@google.com>
> Commit-Queue: Brian Salomon <bsalomon@google.com>

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

Change-Id: I827419bb19972c3644929a8c984bb9534baab0ba
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://skia-review.googlesource.com/41700
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
12 files changed