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

Review URL: https://codereview.chromium.org/150883002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@248067 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 248067