SkPictureShader cleanup

SkPictureShader cleanup

Minor cleanup following http://crrev.com/1405103003.

R=reed@google.com
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1652943002

Committed: https://skia.googlesource.com/skia/+/40bed64ff0f2dc842f01a0e8ad85c0cec9fab4b5

[f(malita), 2016-02-01 13:15:51]

Description was changed from

==========
SkPictureShader cleanup

Minor cleanup following http://crrev.com/1405103003.

R=reed@google.com
==========

to

==========
SkPictureShader cleanup

Minor cleanup following http://crrev.com/1405103003.

R=reed@google.com
GOLD_TRYBOT_URL=
https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&is...
==========

[f(malita), 2016-02-01 13:18:56]

As suggested in https://codereview.chromium.org/1405103003/#msg13, we can fold
the generator and image allocation into one SkImage::NewFromPicture call.

The only downside is we no longer have access to the actual generator
SkImageInfo, but since we only need it for size accounting it's prolly OK to use
a synthetic version.

[f(malita), 2016-02-01 13:19:03]

The CQ bit was checked by fmalita@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-02-01 13:19:11]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1652943002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1652943002/1

[commit-bot: I haz the power, 2016-02-01 13:34:19]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-02-01 13:34:19]

Dry run: This issue passed the CQ dry run.

[reed1, 2016-02-01 16:31:32]

lgtm

[f(malita), 2016-02-01 17:19:10]

The CQ bit was checked by fmalita@chromium.org

[commit-bot: I haz the power, 2016-02-01 17:19:14]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1652943002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1652943002/1

[commit-bot: I haz the power, 2016-02-01 17:19:51]

Description was changed from

==========
SkPictureShader cleanup

Minor cleanup following http://crrev.com/1405103003.

R=reed@google.com
GOLD_TRYBOT_URL=
https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&is...
==========

to

==========
SkPictureShader cleanup

Minor cleanup following http://crrev.com/1405103003.

R=reed@google.com
GOLD_TRYBOT_URL=
https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&is...

Committed:
https://skia.googlesource.com/skia/+/40bed64ff0f2dc842f01a0e8ad85c0cec9fab4b5
==========

[commit-bot: I haz the power, 2016-02-01 17:19:51]

Committed patchset #1 (id:1) as
https://skia.googlesource.com/skia/+/40bed64ff0f2dc842f01a0e8ad85c0cec9fab4b5