Revert of Fix posix IPC channel hanging problem.

Revert of Fix posix IPC channel hanging problem. (https://codereview.chromium.org/30133002/)

Reason for revert:
Seems to cause some leaks.
Reverting while I investigate.
http://build.chromium.org/p/chromium.memory/builders/Linux%20ASAN%20Tests%20%282%29/builds/22398


Original issue's description:
> Fix posix IPC channel hanging problem.
> 
> If a channel closes right before a send call, listeners might not be notified of
> the problem, which can cause hangs. This CL fixes that and adds a test that makes
> sure that this does not happen in the future.
> 
> Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=248060

TBR=cpu@chromium.org,shess@chromium.org,hubbe@google.com
NOTREECHECKS=true
NOTRY=true

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=248067

[hubbe, 2014-01-30 22:59:44]

Created Revert of Fix posix IPC channel hanging problem.

[commit-bot: I haz the power, 2014-01-30 22:59:56]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/hubbe@chromium.org/150883002/1

[commit-bot: I haz the power, 2014-01-30 23:00:41]

Change committed as 248067

[commit-bot: I haz the power, 2014-01-30 23:00:42]

CQ bit was unchecked on CL. Ignoring.