Revert of Don't allow nullptr in texels array params (unless using a transfer buffer).

Revert of Don't allow nullptr in texels array params (unless using a transfer buffer). (patchset #3 id:60001 of https://codereview.chromium.org/1765633002/ )

Reason for revert:
breaks vk build

Original issue's description:
> Don't allow nullptr in texels array params (unless using a transfer buffer).
> 
> Require all levels in writePixels to have a non-nullptr.
> GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1765633002
> 
> Committed: https://skia.googlesource.com/skia/+/8ee78f31b2a29a5f76403755ea17bad9be74a3ec

TBR=jvanverth@google.com,cblume@google.com,cblume@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Committed: https://skia.googlesource.com/skia/+/d3312595c86289113ea5994234844388523499e8

[bsalomon, 2016-03-04 15:06:35]

Created Revert of Don't allow nullptr in texels array params (unless using a
transfer buffer).

[commit-bot: I haz the power, 2016-03-04 15:06:38]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1760343003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1760343003/1

[commit-bot: I haz the power, 2016-03-04 15:06:45]

Description was changed from

==========
Revert of Don't allow nullptr in texels array params (unless using a transfer
buffer). (patchset #3 id:60001 of https://codereview.chromium.org/1765633002/ )

Reason for revert:
breaks vk build

Original issue's description:
> Don't allow nullptr in texels array params (unless using a transfer buffer).
> 
> Require all levels in writePixels to have a non-nullptr.
> GOLD_TRYBOT_URL=
https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&is...
> 
> Committed:
https://skia.googlesource.com/skia/+/8ee78f31b2a29a5f76403755ea17bad9be74a3ec

TBR=jvanverth@google.com,cblume@google.com,cblume@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
==========

to

==========
Revert of Don't allow nullptr in texels array params (unless using a transfer
buffer). (patchset #3 id:60001 of https://codereview.chromium.org/1765633002/ )

Reason for revert:
breaks vk build

Original issue's description:
> Don't allow nullptr in texels array params (unless using a transfer buffer).
> 
> Require all levels in writePixels to have a non-nullptr.
> GOLD_TRYBOT_URL=
https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&is...
> 
> Committed:
https://skia.googlesource.com/skia/+/8ee78f31b2a29a5f76403755ea17bad9be74a3ec

TBR=jvanverth@google.com,cblume@google.com,cblume@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Committed:
https://skia.googlesource.com/skia/+/d3312595c86289113ea5994234844388523499e8
==========

[commit-bot: I haz the power, 2016-03-04 15:06:46]

Committed patchset #1 (id:1) as
https://skia.googlesource.com/skia/+/d3312595c86289113ea5994234844388523499e8