Remove display() from compositing/ LayoutTests

Remove display() from compositing/ LayoutTests

This cleans up the remaining compositing/ display() calls, other than
two tricky cases (squash-animated-gif.html and
video-with-invalid-source.html) which are in different CLs for ease of
review and landing.

BUG=345027
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=169478

[jamesr, 2014-03-13 23:41:24]

lgtm

[enne (OOO), 2014-03-13 23:48:12]

The CQ bit was checked by enne@chromium.org

[commit-bot: I haz the power, 2014-03-13 23:48:19]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/enne@chromium.org/196653012/1

[commit-bot: I haz the power, 2014-03-14 00:37:44]

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

[commit-bot: I haz the power, 2014-03-14 00:37:45]

Try jobs failed on following builders:
  tryserver.chromium on win_blink_rel

[enne (OOO), 2014-03-18 19:32:43]

The CQ bit was checked by enne@chromium.org

[commit-bot: I haz the power, 2014-03-18 19:32:49]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/enne@chromium.org/196653012/20001

[commit-bot: I haz the power, 2014-03-18 20:03:56]

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

[commit-bot: I haz the power, 2014-03-18 20:04:00]

Try jobs failed on following builders:
  tryserver.blink on linux_blink_rel

[enne (OOO), 2014-03-18 20:07:22]

The CQ bit was checked by enne@chromium.org

[commit-bot: I haz the power, 2014-03-18 20:07:26]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/enne@chromium.org/196653012/20001

[commit-bot: I haz the power, 2014-03-18 20:50:24]

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

[commit-bot: I haz the power, 2014-03-18 20:50:25]

Try jobs failed on following builders:
  tryserver.blink on win_blink_rel

[enne (OOO), 2014-03-18 20:51:00]

The CQ bit was checked by enne@chromium.org

[commit-bot: I haz the power, 2014-03-18 20:51:02]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/enne@chromium.org/196653012/20001

[commit-bot: I haz the power, 2014-03-18 21:39:01]

Change committed as 169478