Fix VpxVideoDecoder fuzzer: check initialize and wait for decode.

Fix VpxVideoDecoder fuzzer: check initialize and wait for decode.

Decode() can't be called if initialize fails and just because the
RunLoop is idle it does not mean the decode has finished.

BUG=657446
TEST=fuzzer test

Committed: https://crrev.com/417f6041baad6fa9607a0e96aeab950c7be3f5f5
Cr-Commit-Position: refs/heads/master@{#428763}

[DaleCurtis, 2016-10-27 22:04:11]

dalecurtis@chromium.org changed reviewers:
+ mmoroz@chromium.org

[mmoroz, 2016-10-29 12:53:40]

LGTM, thanks a lot!

[DaleCurtis, 2016-10-31 17:58:04]

The CQ bit was checked by dalecurtis@chromium.org

[commit-bot: I haz the power, 2016-10-31 17:58:33]

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, 2016-10-31 19:04:30]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-10-31 19:18:55]

Description was changed from

==========
Fix VpxVideoDecoder fuzzer: check initialize and wait for decode.

Decode() can't be called if initialize fails and just because the
RunLoop is idle it does not mean the decode has finished.

BUG=657446
TEST=fuzzer test
==========

to

==========
Fix VpxVideoDecoder fuzzer: check initialize and wait for decode.

Decode() can't be called if initialize fails and just because the
RunLoop is idle it does not mean the decode has finished.

BUG=657446
TEST=fuzzer test

Committed: https://crrev.com/417f6041baad6fa9607a0e96aeab950c7be3f5f5
Cr-Commit-Position: refs/heads/master@{#428763}
==========

[commit-bot: I haz the power, 2016-10-31 19:18:56]

Patchset 1 (id:??) landed as
https://crrev.com/417f6041baad6fa9607a0e96aeab950c7be3f5f5
Cr-Commit-Position: refs/heads/master@{#428763}