Remove GP from drawstate, revision of invariant output for GP

BUG=skia:

Review URL: https://codereview.chromium.org/791743003
Revert of Remove GP from drawstate, revision of invariant output for GP (patchset #9 id:160001 of https://codereview.chromium.org/791743003/)

Reason for revert:
breaks mac

Original issue's description:
> Remove GP from drawstate, revision of invariant output for GP
>
> BUG=skia:
>
> Committed: https://skia.googlesource.com/skia/+/c6bc58eded89b0c0a36b8e20e193c200f297a0da

TBR=bsalomon@google.com,egdaniel@google.com,joshualitt@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=skia:

Review URL: https://codereview.chromium.org/794843002
Initial baselines for tall_stretched_bitmaps GM

BUG=skia:

Review URL: https://codereview.chromium.org/789293003
fix for chrome bug with sub pixel hairlines

BUG=skia:

Review URL: https://codereview.chromium.org/796573002
Revert of Fix to set correct output type when blending when we've read dst (patchset #4 id:60001 of https://codereview.chromium.org/791143002/)

Reason for revert:
Breaks DM on windows

Original issue's description:
> Fix to set correct output type when blending when we've read dst
>
> BUG=skia:
>
> Committed: https://skia.googlesource.com/skia/+/733fc2054044377e914559fa4f46db66ab7d9cea

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

Review URL: https://codereview.chromium.org/795783002
Revert of Add more ignore gm's for recent Xfer Processor CL (patchset #1 id:1 of https://codereview.chromium.org/786083004/)

Reason for revert:
Preventing revert of cl breaking windows DM

Original issue's description:
> Add more ignore gm's for recent Xfer Processor CL
>
> TBR=bsalomon@google.com
> NOTRY=true
>
> BUG=skia:
>
> Committed: https://skia.googlesource.com/skia/+/125251133a62a07225b7119ab3ac90153ba4c58a

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

Review URL: https://codereview.chromium.org/794883002
Revert of Create xfer processor backend. (patchset #6 id:100001 of https://codereview.chromium.org/764643004/)

Reason for revert:
CL breaks windows DM

Original issue's description:
> Create xfer processor backend.
>
> This includes:
> -Having an actual XP stage at the end of the gl pipeline.
> -All Blending work is handled by XP until actually setting GL blend states
> -GLPrograms test to test XP
>
> BUG=skia:
>
> Committed: https://skia.googlesource.com/skia/+/4dffc940c430eec66d4707490eace19c9b3f7904

TBR=bsalomon@google.com,joshualitt@chromium.org,egdaniel@google.com
NOTREECHECKS=true
NOTRY=true
BUG=skia:

Review URL: https://codereview.chromium.org/789343002