[ozone] Temporary workaround for GPU support message filter not being installed early enough.

[ozone] Temporary workaround for GPU support message filter not being installed early enough.

Some initial messages may get routed to main thread. Once we get
our first message on io, send it to main to ensure all prior main
thread operations are finished before we continue on io.

BUG=446184
Committed: https://crrev.com/fad5e6acc8cde5aa012581f719d570ceecd5e549
Cr-Commit-Position: refs/heads/master@{#311497}

[alexst (slow to review), 2015-01-13 21:32:20]

alexst@chromium.org changed reviewers:
+ dnicoara@chromium.org

[alexst (slow to review), 2015-01-13 21:32:20]

alexst@chromium.org changed reviewers:
+ dnicoara@chromium.org

[alexst (slow to review), 2015-01-13 21:57:27]

alexst@chromium.org changed reviewers:
+ spang@chromium.org

[dnicoara, 2015-01-14 03:56:55]

lgtm

[alexst (slow to review), 2015-01-14 16:29:40]

The CQ bit was checked by alexst@chromium.org

[commit-bot: I haz the power, 2015-01-14 16:30:22]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/801233003/1

[commit-bot: I haz the power, 2015-01-14 16:35:35]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-01-14 16:35:36]

Try jobs failed on following builders:
  ios_dbg_simulator on tryserver.chromium.mac
(http://build.chromium.org/p/tryserver.chromium.mac/builders/ios_dbg_simulator...)

[alexst (slow to review), 2015-01-14 17:02:36]

The CQ bit was checked by alexst@chromium.org

[commit-bot: I haz the power, 2015-01-14 17:03:43]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/801233003/1

[commit-bot: I haz the power, 2015-01-14 17:18:36]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-01-14 17:19:51]

Patchset 1 (id:??) landed as
https://crrev.com/fad5e6acc8cde5aa012581f719d570ceecd5e549
Cr-Commit-Position: refs/heads/master@{#311497}