This is a reland of 76b80eca64
Original change's description:
> Use GL_ANGLE_instanced_arrays
>
> It turns out the es2 command buffer has supported instanced rendering
> all along. We just weren't using it! This CL starts using
> GL_ANGLE_instanced_arrays, after which point chrome es2 will start
> taking many of our instanced codepaths. It can even use tessellation if
> we update the shaders to not rely on gl_VertexID.
>
> Bug: chromium:1220246
> Change-Id: I173f4c07771691143d2540ecb9c3f8222ed8e4b3
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/422379
> Reviewed-by: Brian Salomon <bsalomon@google.com>
> Commit-Queue: Chris Dalton <csmartdalton@google.com>
Bug: chromium:1220246
Change-Id: I4d6f74adff4e2eda4b55a459faf16b5f5a230d06
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/422616
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Chris Dalton <csmartdalton@google.com>
661abd0f8d