Plumb label string from cache of scratch texture.

In this CL, cache of previously created scratch texture accepts the
label and passes it to the GrGpuResource by making use of existing
resource.

Bug: chromium:1164111
Change-Id: Id798aa5f3fe9baa00c2f409febf4d5fcbe3a675a
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/532276
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Greg Daniel <egdaniel@google.com>
4 files changed