Add Drawing Manager guards against re-entrant flushes

Add Drawing Manager guards against re-entrant flushes

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1538013002

Committed: https://skia.googlesource.com/skia/+/b8918c42b7a4a603e880f9db994f993ca0052ed2

[joshua.litt, 2015-12-18 17:39:09]

Description was changed from

==========
Add Drawing Manager guards against re-entrant flushes

BUG=skia:
==========

to

==========
Add Drawing Manager guards against re-entrant flushes

BUG=skia:
GOLD_TRYBOT_URL=
https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&is...
==========

[joshualitt, 2015-12-18 17:39:18]

joshualitt@google.com changed reviewers:
+ bsalomon@chromium.org, joshualitt@google.com, robertphillips@google.com

[bsalomon, 2015-12-18 17:40:03]

bsalomon@google.com changed reviewers:
+ bsalomon@google.com

[bsalomon, 2015-12-18 17:40:03]

lgtm

[joshualitt, 2015-12-18 17:42:20]

The CQ bit was checked by joshualitt@google.com

[commit-bot: I haz the power, 2015-12-18 17:42:22]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1538013002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1538013002/1

[robertphillips, 2015-12-18 17:50:46]

lgtm

[commit-bot: I haz the power, 2015-12-18 17:59:48]

Description was changed from

==========
Add Drawing Manager guards against re-entrant flushes

BUG=skia:
GOLD_TRYBOT_URL=
https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&is...
==========

to

==========
Add Drawing Manager guards against re-entrant flushes

BUG=skia:
GOLD_TRYBOT_URL=
https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&is...

Committed:
https://skia.googlesource.com/skia/+/b8918c42b7a4a603e880f9db994f993ca0052ed2
==========

[commit-bot: I haz the power, 2015-12-18 17:59:49]

Committed patchset #1 (id:1) as
https://skia.googlesource.com/skia/+/b8918c42b7a4a603e880f9db994f993ca0052ed2