Revert "Fix race on demuxer memory usage. Reuse previous calculation."

Revert "Fix race on demuxer memory usage. Reuse previous calculation."

This reverts commit 9ac642d1d2ed95b810ff276fb65c2be7b461e791.

Now that Demuxer::GetMemoryUsage() runs on the media thread
(fd4cd91c5eea8b3a4970f5512a306e4a03e33101), the reason for the race is
removed and so the synchronization in FFmpegDemuxer can be removed too.

BUG=564034
TEST=Crash page from https://crbug.com/447898 still doesn't crash

Committed: https://crrev.com/9836863217881492da2ff68a74dd66323d11768a
Cr-Commit-Position: refs/heads/master@{#363173}

[wdzierzanowski, 2015-12-03 09:49:11]

wdzierzanowski@opera.com changed reviewers:
+ dalecurtis@chromium.org

[wdzierzanowski, 2015-12-03 09:49:11]

Hey Dale,

please take a look at the next step after
https://codereview.chromium.org/1480213005/.

[DaleCurtis, 2015-12-03 21:55:23]

lgtm

[wdzierzanowski, 2015-12-04 08:08:15]

Thanks!

[wdzierzanowski, 2015-12-04 08:08:23]

The CQ bit was checked by wdzierzanowski@opera.com

[commit-bot: I haz the power, 2015-12-04 08:08:48]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1494113002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1494113002/1

[commit-bot: I haz the power, 2015-12-04 08:48:41]

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

[commit-bot: I haz the power, 2015-12-04 08:48:42]

Try jobs failed on following builders:
  linux_chromium_chromeos_rel_ng on tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)

[wdzierzanowski, 2015-12-04 08:51:44]

The CQ bit was checked by wdzierzanowski@opera.com

[commit-bot: I haz the power, 2015-12-04 08:52:06]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1494113002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1494113002/1

[commit-bot: I haz the power, 2015-12-04 09:22:13]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-12-04 09:23:12]

Description was changed from

==========
Revert "Fix race on demuxer memory usage. Reuse previous calculation."

This reverts commit 9ac642d1d2ed95b810ff276fb65c2be7b461e791.

Now that Demuxer::GetMemoryUsage() runs on the media thread
(fd4cd91c5eea8b3a4970f5512a306e4a03e33101), the reason for the race is
removed and so the synchronization in FFmpegDemuxer can be removed too.

BUG=564034
TEST=Crash page from https://crbug.com/447898 still doesn't crash
==========

to

==========
Revert "Fix race on demuxer memory usage. Reuse previous calculation."

This reverts commit 9ac642d1d2ed95b810ff276fb65c2be7b461e791.

Now that Demuxer::GetMemoryUsage() runs on the media thread
(fd4cd91c5eea8b3a4970f5512a306e4a03e33101), the reason for the race is
removed and so the synchronization in FFmpegDemuxer can be removed too.

BUG=564034
TEST=Crash page from https://crbug.com/447898 still doesn't crash

Committed: https://crrev.com/9836863217881492da2ff68a74dd66323d11768a
Cr-Commit-Position: refs/heads/master@{#363173}
==========

[commit-bot: I haz the power, 2015-12-04 09:23:13]

Patchset 1 (id:??) landed as
https://crrev.com/9836863217881492da2ff68a74dd66323d11768a
Cr-Commit-Position: refs/heads/master@{#363173}