Revert of Bilinear optimization for 1D convolution. (patchset #5 id:200001 of https://codereview.chromium.org/1216623003/)

Reason for revert:
Breaks MSAA

Original issue's description:
> Bilinear optimization for 1D convolution.
>
> Splits GrGLConvolutionEffect into GrGLBilerpConvolutionEffect and
> GrGLBoundedConvolutionEffect. When doing a non-bounded convolution we now
> always use the GrGLBilerpConvolutionEffect which uses bilinear filtering to
> perform half as many samples in the texture.
>
> BUG=skia:3986
>
> Committed: https://skia.googlesource.com/skia/+/91abe10af417148939548551e210c001022d3bda

TBR=bsalomon@google.com,senorblanco@chromium.org,ericrk@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:3986

Review URL: https://codereview.chromium.org/1231383005
2 files changed