Deflake http/tests/navigation/ping-*.

Deflake http/tests/navigation/ping-*.

This CL de-flakes the http/tests/navigation/ping-* suite by ensuring
that each test generates its own ping file dump, and that the temp
directory is consistently used.

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=176335

[Mike West, 2014-06-17 11:56:40]

Hey Kenneth, would you mind reviewing this small deflake patch?

-mike

[kenneth.r.christiansen, 2014-06-17 12:20:23]

lgtm

[Mike West, 2014-06-17 12:25:00]

The CQ bit was checked by mkwst@chromium.org

[commit-bot: I haz the power, 2014-06-17 12:26:04]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/mkwst@chromium.org/334113003/1

[commit-bot: I haz the power, 2014-06-17 13:55:16]

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

[commit-bot: I haz the power, 2014-06-17 13:55:17]

Try jobs failed on following builders:
  win_gpu_triggered_tests on tryserver.chromium.gpu
(http://build.chromium.org/p/tryserver.chromium.gpu/builders/win_gpu_triggered...)

[Mike West, 2014-06-17 15:55:46]

The CQ bit was checked by mkwst@chromium.org

[commit-bot: I haz the power, 2014-06-17 15:56:29]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/mkwst@chromium.org/334113003/1

[commit-bot: I haz the power, 2014-06-17 17:09:22]

Change committed as 176335