Revert of Remove SkDEPRECATED_InstallDiscardablePixelRef from SkPictureShader (patchset #3 id:40001 of https://codereview.chromium.org/1405103003/ )

Reason for revert:
Test to see if patch fixes Nexus 6.

Original issue's description:
> Remove SkDEPRECATED_InstallDiscardablePixelRef from SkPictureShader
>
> Use an SkImage generator/shader instead.
>
> R=reed@google.com
>
> Committed: https://skia.googlesource.com/skia/+/fa694ad067976a5b713eec0b6f92ba5efeb0aa9d

TBR=reed@google.com,fmalita@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Review URL: https://codereview.chromium.org/1407043008
1 file changed