Save ping+beacon test status in temporary directory.

Save ping+beacon test status in temporary directory.

Try to address occasional Windows-only test failures by explicitly saving
away the ping + beacon requests in the system temporary directory. Also
make read access to the test status file a bit more robust.

R=
BUG=374569
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=174484

[sof, 2014-05-18 21:12:18]

Please take a look.

Unclear if this gets at the problem, unable to reproduce locally, but the tests
will at least be more robust.

[sof, 2014-05-20 11:45:51]

+jochen: test deflaking attempt, looks ok?

[jochen (gone - plz use gerrit), 2014-05-21 09:22:17]

+mkwst who had similar problems with CSP iirc

[Mike West, 2014-05-21 09:32:46]

On 2014/05/21 09:22:17, jochen wrote:
> +mkwst who had similar problems with CSP iirc

I don't think I ever had to do anything clever with regard to the file creation,
other than https://chromiumcodereview.appspot.com/23172003 which ensured that
every test had a distinct file (which it looks like we're already doing here).

Regardless, this patch LGTM as an attempt to fix the flake.

[sof, 2014-05-21 09:37:54]

On 2014/05/21 09:32:46, Mike West wrote:
> On 2014/05/21 09:22:17, jochen wrote:
> > +mkwst who had similar problems with CSP iirc
> 
> I don't think I ever had to do anything clever with regard to the file
creation,
> other than https://chromiumcodereview.appspot.com/23172003 which ensured that
> every test had a distinct file (which it looks like we're already doing here).
> 
> Regardless, this patch LGTM as an attempt to fix the flake.

Thanks, will watch results for a bit to see if this gets at the problem. (=>
expectations update is in order.)

[sof, 2014-05-21 09:37:59]

The CQ bit was checked by sigbjornf@opera.com

[commit-bot: I haz the power, 2014-05-21 09:39:16]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/sigbjornf@opera.com/286063003/1

[commit-bot: I haz the power, 2014-05-21 22:02:35]

Change committed as 174484