Use placement new to allocate GPU command buffer entries.

Use placement new to allocate GPU command buffer entries.

This isn't as ugly as the crazy null check, and it seems to be compiled correctly.

BUG=

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=288481

[jschuh, 2014-08-07 20:02:19]

Still ugly, but much less ugly. lgtm

[jbauman, 2014-08-07 20:02:41]

The CQ bit was checked by jbauman@chromium.org

[commit-bot: I haz the power, 2014-08-07 20:06:36]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/jbauman@chromium.org/427003008/20001

[commit-bot: I haz the power, 2014-08-08 01:22:36]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  android_dbg_triggered_tests on tryserver.chromium.linux
(http://build.chromium.org/p/tryserver.chromium.linux/builders/android_dbg_tri...)

[commit-bot: I haz the power, 2014-08-08 01:44:30]

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

[commit-bot: I haz the power, 2014-08-08 01:44:31]

Try jobs failed on following builders:
  android_dbg_triggered_tests on tryserver.chromium.linux
(http://build.chromium.org/p/tryserver.chromium.linux/builders/android_dbg_tri...)

[jbauman, 2014-08-09 00:40:57]

The CQ bit was checked by jbauman@chromium.org

[commit-bot: I haz the power, 2014-08-09 00:44:20]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/jbauman@chromium.org/427003008/20001

[commit-bot: I haz the power, 2014-08-09 00:57:01]

Change committed as 288481