Increase timeout for Mac when running print preview tests.

Increase timeout for Mac when running print preview tests.

BUG=388517
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=180206

[ivandavid, 2014-08-13 02:34:35]

It seems like an increase in timeout is necessary on Mac. If there are no
expected files, it takes a long time (at long as on Windows it seems), this
timeout increase will alleviate that problem.

[Dirk Pranke, 2014-08-13 16:48:49]

lgtm

[Lei Zhang, 2014-08-13 17:07:35]

The CQ bit was checked by thestig@chromium.org

[commit-bot: I haz the power, 2014-08-13 17:08:24]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/ivandavid@chromium.org/466223002/20001

[commit-bot: I haz the power, 2014-08-13 18:07:42]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  linux_blink_dbg on tryserver.blink
(http://build.chromium.org/p/tryserver.blink/builders/linux_blink_dbg/builds/2...)
  linux_blink_rel on tryserver.blink
(http://build.chromium.org/p/tryserver.blink/builders/linux_blink_rel/builds/2...)
  mac_blink_rel on tryserver.blink
(http://build.chromium.org/p/tryserver.blink/builders/mac_blink_rel/builds/19688)
  win_blink_rel on tryserver.blink
(http://build.chromium.org/p/tryserver.blink/builders/win_blink_rel/builds/22592)
  linux_gpu_triggered_tests on tryserver.chromium.gpu
(http://build.chromium.org/p/tryserver.chromium.gpu/builders/linux_gpu_trigger...)
  mac_gpu_retina_triggered_tests on tryserver.chromium.gpu
(http://build.chromium.org/p/tryserver.chromium.gpu/builders/mac_gpu_retina_tr...)
  mac_gpu_triggered_tests on tryserver.chromium.gpu
(http://build.chromium.org/p/tryserver.chromium.gpu/builders/mac_gpu_triggered...)
  win_gpu_triggered_tests on tryserver.chromium.gpu
(http://build.chromium.org/p/tryserver.chromium.gpu/builders/win_gpu_triggered...)

[commit-bot: I haz the power, 2014-08-13 21:09:21]

Committed patchset #2 (20001) as 180206