FFmpeg roll for M43.

FFmpeg roll for M43.

Update FFmpegDemuxer::OnFindStreamInfoDone with the new
AVFormatContext layout.

BUG=465940

[watk, 2015-03-27 23:07:11]

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

[watk, 2015-03-27 23:09:55]

The upstream merge is pushed to the ffmpeg master branch!

[DaleCurtis, 2015-03-27 23:50:34]

lgtm, great work! Fingers crossed all the bots are happy :)

[watk, 2015-03-28 00:13:47]

The CQ bit was checked by watk@chromium.org

[commit-bot: I haz the power, 2015-03-28 00:14:01]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1032543004/20001

[watk, 2015-03-28 00:14:02]

The CQ bit was unchecked by watk@chromium.org

[watk, 2015-03-28 00:45:19]

The CQ bit was checked by watk@chromium.org

[commit-bot: I haz the power, 2015-03-28 00:45:29]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1032543004/20001

[commit-bot: I haz the power, 2015-03-28 00:45:55]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-03-28 00:46:22]

Patchset 2 (id:??) landed as
https://crrev.com/02c707cdd098e97dd78c3ff2858576dcbcaa9082
Cr-Commit-Position: refs/heads/master@{#322688}

[watk, 2015-03-28 01:15:43]

A revert of this CL (patchset #2 id:20001) has been created in
https://codereview.chromium.org/1046493002/ by watk@chromium.org.

The reason for reverting is: Failed to compile: 

http://build.chromium.org/p/chromium.gpu/builders/GPU%20Mac%20Builder/builds/....

[watk, 2015-03-30 19:51:05]

On 2015/03/28 01:15:43, watk wrote:
> A revert of this CL (patchset #2 id:20001) has been created in
> https://codereview.chromium.org/1046493002/ by mailto:watk@chromium.org.
> 
> The reason for reverting is: Failed to compile: 
> 
>
http://build.chromium.org/p/chromium.gpu/builders/GPU%20Mac%20Builder/builds/....

Note: the updated roll CL is here https://codereview.chromium.org/1043883003