Invalidate FFmpegDemuxer WeakPtrs on the right thread.

Invalidate FFmpegDemuxer WeakPtrs on the right thread.

Previously these may not have been invalidated until the class is
destructed on the render thread, when they are bound to the media
thread.

BUG=618625
TEST=none

Committed: https://crrev.com/9053fbc0d49919dd9e48b86d7df820562e845d80
Cr-Commit-Position: refs/heads/master@{#400835}

[DaleCurtis, 2016-06-20 17:53:32]

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

[sandersd (OOO until July 31), 2016-06-20 19:00:17]

lgtm

[DaleCurtis, 2016-06-20 19:52:30]

The CQ bit was checked by dalecurtis@chromium.org

[commit-bot: I haz the power, 2016-06-20 19:53:25]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/2084643003/1

[commit-bot: I haz the power, 2016-06-20 20:55:05]

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

[commit-bot: I haz the power, 2016-06-20 20:55:06]

Try jobs failed on following builders:
  win_chromium_rel_ng on tryserver.chromium.win (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_rel_...)

[DaleCurtis, 2016-06-20 22:23:18]

The CQ bit was checked by dalecurtis@chromium.org

[commit-bot: I haz the power, 2016-06-20 22:23:43]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/2084643003/1

[commit-bot: I haz the power, 2016-06-20 23:40:42]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-06-20 23:44:21]

Description was changed from

==========
Invalidate FFmpegDemuxer WeakPtrs on the right thread.

Previously these may not have been invalidated until the class is
destructed on the render thread, when they are bound to the media
thread.

BUG=618625
TEST=none
==========

to

==========
Invalidate FFmpegDemuxer WeakPtrs on the right thread.

Previously these may not have been invalidated until the class is
destructed on the render thread, when they are bound to the media
thread.

BUG=618625
TEST=none

Committed: https://crrev.com/9053fbc0d49919dd9e48b86d7df820562e845d80
Cr-Commit-Position: refs/heads/master@{#400835}
==========

[commit-bot: I haz the power, 2016-06-20 23:44:22]

Patchset 1 (id:??) landed as
https://crrev.com/9053fbc0d49919dd9e48b86d7df820562e845d80
Cr-Commit-Position: refs/heads/master@{#400835}