Rebaseline for s4-Release for 6fee786210bd2.
Start stripping out complicated parts of SkPicture{Record,Data}.

First step: no more paint flattening or deduplication.

BUG=skia:

Review URL: https://codereview.chromium.org/723593002
Revert of Sk4x_sse.h (patchset #18 id:330001 of https://codereview.chromium.org/698873003/)

Reason for revert:
Failing bots.

Original issue's description:
> Sk4x_sse.h
>
>
> BUG=skia:
>
> Committed: https://skia.googlesource.com/skia/+/e4bf793120d3bfc9b003d11880a3fb73ff2b89e9

TBR=reed@google.com,mtklein@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=skia:

Review URL: https://codereview.chromium.org/719143002
detect bad bitmaps during deserialization

BUG=skia:3117

Review URL: https://codereview.chromium.org/718103002
Rename GrAccelData to SkLayerInfo and move it to src/core

Review URL: https://codereview.chromium.org/719133002
Follow up.

BUG=skia:

Review URL: https://codereview.chromium.org/719853002
Fix memory leak in BitmapHeapTest

BUG=skia:

Review URL: https://codereview.chromium.org/715383003
More cleanup: streamline paths and bitmaps.

SkBitmapHeap is still used---now exclusively---by pipe.

BUG=skia:

Review URL: https://codereview.chromium.org/715413002
set key data in duplicate scratch key unit test

TBR=robertphillips@google.com

Review URL: https://codereview.chromium.org/722763002