Prevent cross-thread refcounting for thread-unsafe IndexedDBCallbacks.

Prevent cross-thread refcounting for thread-unsafe IndexedDBCallbacks.

This object is refcounted but is not thread safe. Transfering ownership
of the first reference (since it is created on the IO thread) to the
callback should prevent issues.

BUG=657862
Committed: https://crrev.com/a7233873f6fa93ddf414555f7d60f9baba71cd0e
Cr-Commit-Position: refs/heads/master@{#426583}

[Reilly Grant (use Gerrit), 2016-10-20 19:10:31]

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

[Reilly Grant (use Gerrit), 2016-10-20 19:10:52]

reillyg@chromium.org changed reviewers:
+ cmumford@chromium.org

[Reilly Grant (use Gerrit), 2016-10-20 19:10:53]

Please take a look.

[commit-bot: I haz the power, 2016-10-20 19:10:59]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[jsbell, 2016-10-20 19:25:55]

jsbell@chromium.org changed reviewers:
+ jsbell@chromium.org

[jsbell, 2016-10-20 19:25:56]

lgtm

[Reilly Grant (use Gerrit), 2016-10-20 19:31:52]

The CQ bit was unchecked by reillyg@chromium.org

[Reilly Grant (use Gerrit), 2016-10-20 19:31:55]

The CQ bit was checked by reillyg@chromium.org

[commit-bot: I haz the power, 2016-10-20 19:32:39]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-10-20 20:33:42]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-10-21 13:22:01]

Description was changed from

==========
Prevent cross-thread refcounting for thread-unsafe IndexedDBCallbacks.

This object is refcounted but is not thread safe. Transfering ownership
of the first reference (since it is created on the IO thread) to the
callback should prevent issues.

BUG=657862
==========

to

==========
Prevent cross-thread refcounting for thread-unsafe IndexedDBCallbacks.

This object is refcounted but is not thread safe. Transfering ownership
of the first reference (since it is created on the IO thread) to the
callback should prevent issues.

BUG=657862

Committed: https://crrev.com/a7233873f6fa93ddf414555f7d60f9baba71cd0e
Cr-Commit-Position: refs/heads/master@{#426583}
==========

[commit-bot: I haz the power, 2016-10-21 13:22:02]

Patchset 1 (id:??) landed as
https://crrev.com/a7233873f6fa93ddf414555f7d60f9baba71cd0e
Cr-Commit-Position: refs/heads/master@{#426583}