Revert of Remove gpu shader optimatization for solid white or trans black colors (https://codereview.chromium.org/375823005/)

Reason for revert:
possible test and gm failures

Original issue's description:
> Remove gpu shader optimatization for solid white or trans black colors
>
> Running test on the added bench which draws a grid of all white paths, all blue paths, or alternating checkered white/blue paths.
>
> With optimization in (ms):
>          White       Blue        Checkered
> Linux    ~80         ~80         ~160
> N7       ~800        ~1100       ~1500
> Moto-e   ~830        ~1100       ~2500
>
> Without optimization in (ms):
>          White       Blue        Checkered
> Linux    ~80         ~80         ~80
> N7       ~1100       ~1100       ~1100
> Moto-e   ~1100       ~1100       ~1500
>
> BUG=skia:
>
> Committed: https://skia.googlesource.com/skia/+/5f78d2251a440443c9eaa321dad058d7a32bfef7

R=bsalomon@google.com
TBR=bsalomon@google.com
NOTREECHECKS=true
NOTRY=true
BUG=skia:

Author: egdaniel@google.com

Review URL: https://codereview.chromium.org/385163004

0 files changed, 0 insertions, 0 deletions