Reland another small part of r267947. Second attempt.

Reland another small part of r267947. Second attempt.

This just contains only the download_to_file chuck from r267947 which is
unlikely to break any layout tests, existing unit tests or chrome production
code.

Tests ran: both content_shell and content_unittests

BUG=265753, 338338, 237249
R=jam@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=269432

[tfarina, 2014-05-09 02:21:18]

ptal.

fired some tsan, asan bots to make sure it doesn't happen again.

sorry for the breakage.

[tfarina, 2014-05-09 03:31:45]

FYI, linux_asan trybot does not run content_unittests. Sigh :/

Hopefully, looks like mac_asan does.

[tfarina, 2014-05-09 03:34:14]

I have filed crbug.com/371674 for the trybot difference.

[tfarina, 2014-05-09 03:55:20]

content_unittests passed on mac_asan:

http://build.chromium.org/p/tryserver.chromium/builders/mac_asan/builds/42500...

[jam, 2014-05-09 17:18:41]

lgtm

[tfarina, 2014-05-09 17:29:41]

The CQ bit was checked by tfarina@chromium.org

[commit-bot: I haz the power, 2014-05-09 17:31:05]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/tfarina@chromium.org/274473003/20001

[commit-bot: I haz the power, 2014-05-09 17:45:08]

FYI, CQ is re-trying this CL (attempt #1).
Please consider checking whether the failures are real,
and report flakes to chrome-troopers@google.com.
The failing builders are:
  chromium_presubmit on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/chromium_presubmit/bu...)
  ios_rel_device_ninja on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/ios_rel_device_ninja/...)
  linux_chromium_chromeos_clang_dbg on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/linux_chromium_chrome...)

[commit-bot: I haz the power, 2014-05-09 17:49:25]

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

[commit-bot: I haz the power, 2014-05-09 17:49:26]

Try jobs failed on following builders:
  chromium_presubmit on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/chromium_presubmit/bu...)
  linux_chromium_chromeos_clang_dbg on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/linux_chromium_chrome...)

[tfarina, 2014-05-09 19:59:32]

The CQ bit was checked by tfarina@chromium.org

[commit-bot: I haz the power, 2014-05-09 20:04:11]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/tfarina@chromium.org/274473003/20001

[commit-bot: I haz the power, 2014-05-09 20:41:03]

FYI, CQ is re-trying this CL (attempt #1).
Please consider checking whether the failures are real,
and report flakes to chrome-troopers@google.com.
The failing builders are:
  chromium_presubmit on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/chromium_presubmit/bu...)
  ios_rel_device_ninja on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/ios_rel_device_ninja/...)
  linux_chromium_chromeos_clang_dbg on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/linux_chromium_chrome...)

[commit-bot: I haz the power, 2014-05-09 20:49:08]

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

[commit-bot: I haz the power, 2014-05-09 20:49:08]

Try jobs failed on following builders:
  chromium_presubmit on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/chromium_presubmit/bu...)
  ios_rel_device_ninja on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/ios_rel_device_ninja/...)

[tfarina, 2014-05-09 21:25:57]

The CQ bit was checked by tfarina@chromium.org

[commit-bot: I haz the power, 2014-05-09 21:30:18]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/tfarina@chromium.org/274473003/40001

[tfarina, 2014-05-09 22:18:05]

Committed patchset #3 manually as r269432 (presubmit successful).