MSE: Protect better against out-of-sequence parser callbacks

MSE: Protect better against out-of-sequence parser callbacks

Adds parser initialization state tracking to MediaSourceState and
enforces correct sequencing of parser callbacks with DCHECKs.

BUG=597447
Committed: https://crrev.com/1c42c49d49f2edfc5b2681694685c712f03f02fd
Cr-Commit-Position: refs/heads/master@{#384087}

[wolenetz, 2016-03-29 22:08:29]

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

[commit-bot: I haz the power, 2016-03-29 22:08:57]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1843823003/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1843823003/20001

[wolenetz, 2016-03-29 22:10:29]

wolenetz@chromium.org changed reviewers:
+ chcunningham@chromium.org

[wolenetz, 2016-03-29 22:10:29]

PTAL

[commit-bot: I haz the power, 2016-03-30 00:28:20]

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

[commit-bot: I haz the power, 2016-03-30 00:28:21]

Dry run: This issue passed the CQ dry run.

[wolenetz, 2016-03-30 18:07:42]

friendly ping :)

[chcunningham, 2016-03-30 20:40:50]

lgtm

Thanks Matt

[wolenetz, 2016-03-30 20:45:34]

On 2016/03/30 20:40:50, chcunningham wrote:
> lgtm
> 
> Thanks Matt

Thanks for reviews.

[wolenetz, 2016-03-30 20:45:37]

The CQ bit was checked by wolenetz@chromium.org

[commit-bot: I haz the power, 2016-03-30 20:45:57]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1843823003/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1843823003/20001

[commit-bot: I haz the power, 2016-03-30 20:51:09]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-03-30 20:54:43]

Description was changed from

==========
MSE: Protect better against out-of-sequence parser callbacks

Adds parser initialization state tracking to MediaSourceState and
enforces correct sequencing of parser callbacks with DCHECKs.

BUG=597447
==========

to

==========
MSE: Protect better against out-of-sequence parser callbacks

Adds parser initialization state tracking to MediaSourceState and
enforces correct sequencing of parser callbacks with DCHECKs.

BUG=597447

Committed: https://crrev.com/1c42c49d49f2edfc5b2681694685c712f03f02fd
Cr-Commit-Position: refs/heads/master@{#384087}
==========

[commit-bot: I haz the power, 2016-03-30 20:54:44]

Patchset 2 (id:??) landed as
https://crrev.com/1c42c49d49f2edfc5b2681694685c712f03f02fd
Cr-Commit-Position: refs/heads/master@{#384087}