This reverts commit 73657689b6.
Reason for revert: Many bad GMs.
Original change's description:
> drawVertices in GPU backend uses drawVustomMesh implementation.
>
> This still allows batching across view matrix changes but does not batch
> across SkVertices that have different attributes.
>
> Bug: skia:12720
> Change-Id: I34b58e2ae3aa7330b1fe3280b9448197e2bb68b0
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/491047
> Reviewed-by: Greg Daniel <egdaniel@google.com>
> Commit-Queue: Brian Salomon <bsalomon@google.com>
Bug: skia:12720
Change-Id: I2aa0a62323e54cb999cc89eccd72cf9b93dccba9
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/492356
Auto-Submit: Brian Osman <brianosman@google.com>
Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
5bb80e1ee0