media: Add RunOnDestruction

media: Add RunOnDestruction

This is a decorator of base::OnceCallback which wraps the original
callback into a new callback. When the callback runs, it runs the
original callback. When the callback is destructed without ever
running, the orignal callback will be run with parameters specified.

BUG=
TEST=

[xhwang, 2017-03-28 07:27:18]

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

[commit-bot: I haz the power, 2017-03-28 07:27:29]

Dry run: 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, 2017-03-28 07:31:10]

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

[commit-bot: I haz the power, 2017-03-28 07:31:11]

Dry run: Try jobs failed on following builders:
  linux_chromium_chromeos_ozone_rel_ng on master.tryserver.chromium.linux
(JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)
  linux_chromium_compile_dbg_ng on master.tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)

[xhwang, 2017-03-28 22:50:46]

Description was changed from

==========
media: Add RunOnDestruction

This is a decorator of base::OnceCallback which wraps the original
callback into a new callback. When the callback runs, it runs the
original callback. When the callback is destructed, the orignal callback
will be run with parameters specified.

BUG=
TEST=
==========

to

==========
media: Add RunOnDestruction

This is a decorator of base::OnceCallback which wraps the original
callback into a new callback. When the callback runs, it runs the
original callback. When the callback is destructed without ever
running, the orignal callback will be run with parameters specified.

BUG=
TEST=
==========