Revert "Don't require mips in GrTextureProducer if texture is 1x1."

This reverts commit 5191fd7555d34225ef771ad4cac65bcbbb50a89c.

Reason for revert: breaking angle

Original change's description:
> Don't require mips in GrTextureProducer if texture is 1x1.
> 
> Bug: chromium:862921
> Change-Id: I5f3584ad36e160a5a09d0a37e31e147155076b4d
> Reviewed-on: https://skia-review.googlesource.com/142586
> Reviewed-by: Brian Osman <brianosman@google.com>
> Reviewed-by: Brian Salomon <bsalomon@google.com>
> Commit-Queue: Greg Daniel <egdaniel@google.com>

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

Change-Id: Iaef7a56b061cb41f4c75ec20d8df77d3e52b194d
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: chromium:862921
Reviewed-on: https://skia-review.googlesource.com/142600
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Greg Daniel <egdaniel@google.com>
8 files changed