fixed SkDebugCanvas' handling of drawPicture

fixed SkDebugCanvas' handling of drawPicture
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1685133008

Committed: https://skia.googlesource.com/skia/+/891ad66d148873c0a816192791ad7258eda71a28

[ethannicholas, 2016-02-12 14:41:17]

Description was changed from

==========
fixed SkDebugCanvas' handling of drawPicture
==========

to

==========
fixed SkDebugCanvas' handling of drawPicture
GOLD_TRYBOT_URL=
https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&is...
==========

[ethannicholas, 2016-02-12 14:42:55]

ethannicholas@google.com changed reviewers:
+ jcgregorio@google.com, joshualitt@google.com

[ethannicholas, 2016-02-12 14:42:56]

This fixes the issue I described to Joe yesterday, with parts of the tiger SKP
simply not showing up. Turns out the parts in question were nested pictures, and
nested pictures were not being rendered at all in most cases.

[jcgregorio, 2016-02-12 14:47:43]

lgtm

[ethannicholas, 2016-02-12 14:47:59]

The CQ bit was checked by ethannicholas@google.com

[commit-bot: I haz the power, 2016-02-12 14:48:03]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1685133008/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1685133008/1

[commit-bot: I haz the power, 2016-02-12 15:15:48]

Description was changed from

==========
fixed SkDebugCanvas' handling of drawPicture
GOLD_TRYBOT_URL=
https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&is...
==========

to

==========
fixed SkDebugCanvas' handling of drawPicture
GOLD_TRYBOT_URL=
https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&is...

Committed:
https://skia.googlesource.com/skia/+/891ad66d148873c0a816192791ad7258eda71a28
==========

[commit-bot: I haz the power, 2016-02-12 15:15:49]

Committed patchset #1 (id:1) as
https://skia.googlesource.com/skia/+/891ad66d148873c0a816192791ad7258eda71a28