net: Make sure the FileStream file is closed on the worker thread.

net: Make sure the FileStream file is closed on the worker thread.

When a FileStream is deleted while Open is in progress, the file was being
closed on the wrong thread because it was not being transferred to the
FileStream::Context.

This CL transfers the file to the context even if it is orphaned.

BUG=322664
TEST=net_unittests

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=267977

[rvargas (doing something else), 2014-04-25 21:17:54]

PTAL

[rvargas (doing something else), 2014-04-30 23:50:49]

On 2014/04/25 21:17:54, rvargas wrote:
> PTAL

ping

[willchan no longer on Chromium, 2014-05-02 19:44:58]

lgtm

[rvargas (doing something else), 2014-05-02 20:09:56]

The CQ bit was checked by rvargas@chromium.org

[commit-bot: I haz the power, 2014-05-02 20:10:11]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/rvargas@chromium.org/250783002/20001

[commit-bot: I haz the power, 2014-05-02 20:54:20]

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

[commit-bot: I haz the power, 2014-05-02 20:54:21]

Try jobs failed on following builders:
  mac_chromium_rel on tryserver.chromium

[rvargas (doing something else), 2014-05-02 21:44:23]

The CQ bit was checked by rvargas@chromium.org

[commit-bot: I haz the power, 2014-05-02 21:44:41]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/rvargas@chromium.org/250783002/20001

[commit-bot: I haz the power, 2014-05-02 23:59:02]

Change committed as 267977