Fix some bugs and performance issues with skiaserve

Fix some bugs and performance issues with skiaserve

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1777203003

Committed: https://skia.googlesource.com/skia/+/ae47aeeda09408989223291c54d12b2a98fa2b12

[joshua.litt, 2016-03-10 20:02:18]

Description was changed from

==========
Fix some bugs and performance issues with skiaserve

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

to

==========
Fix some bugs and performance issues with skiaserve

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

[joshualitt, 2016-03-10 20:06:04]

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

[joshualitt, 2016-03-10 20:06:05]

ptal, just a few last minute fixes.

[ethannicholas, 2016-03-10 21:01:46]

lgtm

[joshualitt, 2016-03-10 21:11:53]

The CQ bit was checked by joshualitt@google.com

[commit-bot: I haz the power, 2016-03-10 21:12:04]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1777203003/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1777203003/20001

[commit-bot: I haz the power, 2016-03-10 21:29:38]

Description was changed from

==========
Fix some bugs and performance issues with skiaserve

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

to

==========
Fix some bugs and performance issues with skiaserve

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/+/ae47aeeda09408989223291c54d12b2a98fa2b12
==========

[commit-bot: I haz the power, 2016-03-10 21:29:39]

Committed patchset #2 (id:20001) as
https://skia.googlesource.com/skia/+/ae47aeeda09408989223291c54d12b2a98fa2b12