This reverts commit 2202680c.

Reason for revert: ASAN found error https://ci.chromium.org/buildbot/chromium.gpu.fyi/Mac%20FYI%20GPU%20ASAN%20Release/210

Original change's description:
> Add NPOT validation to copyTextureCHROMIUM
> 
> copyTextureCHROMIUM should generate INVALID_VALUE when using a NPOT
> texture and level not equal to zero, so we should add
> validation to catch this case.
> 
> BUG=angleproject:2380
> 
> Change-Id: I0ea50a981e4d8f10f5913969f6b629617b57aa15
> Reviewed-on: https://chromium-review.googlesource.com/951713
> Commit-Queue: Geoff Lang <geofflang@chromium.org>
> Reviewed-by: Geoff Lang <geofflang@chromium.org>

TBR=geofflang@chromium.org,jmadill@chromium.org,brandon1.jones@intel.com

Change-Id: I04dcbd5e1d97b1bd968b26a06e4d3e4d175be0d8
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: angleproject:2380
Reviewed-on: https://chromium-review.googlesource.com/953343Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Commit-Queue: Yuly Novikov <ynovikov@chromium.org>