This reverts commit ff38106d.
Reason for revert: Speculative revert to clear up AMD. See bug.
Bug: chromium:1154356
Original change's description:
> Vulkan: Use specialization constant for halfRenderAreaWidth
>
> halfRenderArea is used by fragment shader to adjust gl_FragCoord for
> rotation and yflip compensation. This CL bakes halfRenderAreaWidth into
> shader via specialization constant, thus allow compiler to consolidate
> the calculation into one MAD instruction.
>
> Bug: b/173800146
> Change-Id: Id66301278e3389e2582369b695825e632bccecee
> Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2551541
> Commit-Queue: Charlie Lao <cclao@google.com>
> Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
> Reviewed-by: Tim Van Patten <timvp@google.com>
> Reviewed-by: Jamie Madill <jmadill@chromium.org>
TBR=timvp@google.com,syoussefi@chromium.org,jmadill@chromium.org,cclao@google.com
Change-Id: Idab612bcad4f179857c41ffc4bf8fa2355fae946
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: b/173800146
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2568244Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>
