DM: dm.json can be missing some final results

DM: dm.json can be missing some final results

We called JsonWriter::DumpJson() every once in a while,
but this did not necssarily wait for offloaded PNG encoding to finish.

This means we might have been dropping some DM results for a while now.
Fix by one more JsonWriter::DumpJson() call after joining back to the
main thread.

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1744723002

Committed: https://skia.googlesource.com/skia/+/e027f1705eb29560df334bcc02a27e5774277984

[mtklein_C, 2016-02-26 23:39:47]

Description was changed from

==========
DM: dm.json can be missing some final results

We called JsonWriter::DumpJson() every once in a while,
but this did not necssarily wait for offloaded PNG encoding to finish.

This means we might have been dropping some DM results for a while now.
Fix by one more JsonWriter::DumpJson() call after joining back to the
main thread.

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

to

==========
DM: dm.json can be missing some final results

We called JsonWriter::DumpJson() every once in a while,
but this did not necssarily wait for offloaded PNG encoding to finish.

This means we might have been dropping some DM results for a while now.
Fix by one more JsonWriter::DumpJson() call after joining back to the
main thread.

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

[mtklein, 2016-02-26 23:40:06]

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

[mtklein, 2016-02-26 23:40:06]

The CQ bit was checked by mtklein@google.com

[mtklein, 2016-02-26 23:40:06]

lgtm

[commit-bot: I haz the power, 2016-02-26 23:40:12]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1744723002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1744723002/1

[commit-bot: I haz the power, 2016-02-26 23:53:09]

Description was changed from

==========
DM: dm.json can be missing some final results

We called JsonWriter::DumpJson() every once in a while,
but this did not necssarily wait for offloaded PNG encoding to finish.

This means we might have been dropping some DM results for a while now.
Fix by one more JsonWriter::DumpJson() call after joining back to the
main thread.

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

to

==========
DM: dm.json can be missing some final results

We called JsonWriter::DumpJson() every once in a while,
but this did not necssarily wait for offloaded PNG encoding to finish.

This means we might have been dropping some DM results for a while now.
Fix by one more JsonWriter::DumpJson() call after joining back to the
main thread.

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/+/e027f1705eb29560df334bcc02a27e5774277984
==========

[commit-bot: I haz the power, 2016-02-26 23:53:10]

Committed patchset #1 (id:1) as
https://skia.googlesource.com/skia/+/e027f1705eb29560df334bcc02a27e5774277984