Check output_surface_ is not null before calling ForceReclaimResources

Check output_surface_ is not null before calling ForceReclaimResources

BUG=450184
Committed: https://crrev.com/2993a080acf3049838a429f4bbf96037ae8c4408
Cr-Commit-Position: refs/heads/master@{#312699}

[jbauman, 2015-01-20 23:01:37]

jbauman@chromium.org changed reviewers:
+ danakj@chromium.org

[danakj, 2015-01-20 23:04:06]

LGTM

[jbauman, 2015-01-20 23:04:22]

The CQ bit was checked by jbauman@chromium.org

[commit-bot: I haz the power, 2015-01-20 23:05:30]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/859033003/1

[commit-bot: I haz the power, 2015-01-21 00:43:13]

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

[commit-bot: I haz the power, 2015-01-21 00:43:14]

Try jobs failed on following builders:
  win_gpu on tryserver.chromium.gpu
(http://build.chromium.org/p/tryserver.chromium.gpu/builders/win_gpu/builds/11...)
  win_gpu_triggered_tests on tryserver.chromium.gpu
(http://build.chromium.org/p/tryserver.chromium.gpu/builders/win_gpu_triggered...)

[jbauman, 2015-01-22 23:12:47]

The CQ bit was checked by jbauman@chromium.org

[commit-bot: I haz the power, 2015-01-22 23:13:53]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/859033003/1

[commit-bot: I haz the power, 2015-01-22 23:16:36]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-01-22 23:17:54]

Patchset 1 (id:??) landed as
https://crrev.com/2993a080acf3049838a429f4bbf96037ae8c4408
Cr-Commit-Position: refs/heads/master@{#312699}