Oilpan: remove GC plugin ignore for recursive value objects.

Oilpan: remove GC plugin ignore for recursive value objects.

The GC_PLUGIN_IGNORE() is no longer needed as clang rolls now includes
http://crbug.com/424962

R=kouhei,haraken
BUG=424962
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=187276

[sof, 2014-12-16 12:36:50]

sigbjornf@opera.com changed reviewers:
+ oilpan-reviews@chromium.org

[sof, 2014-12-16 12:36:51]

Please take a look.

clang roll based on 223108 appears to have settled, so this can go ahead.

[kouhei (in TOK), 2014-12-16 13:29:46]

kouhei@chromium.org changed reviewers:
+ kouhei@chromium.org

[kouhei (in TOK), 2014-12-16 13:29:47]

lgtm % trybots are green

[haraken, 2014-12-16 13:46:39]

LGTM

[sof, 2014-12-16 14:07:40]

The CQ bit was checked by sigbjornf@opera.com

[commit-bot: I haz the power, 2014-12-16 14:08:32]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/735263002/1

[commit-bot: I haz the power, 2014-12-16 15:44:50]

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

[commit-bot: I haz the power, 2014-12-16 15:44:52]

Try jobs failed on following builders:
  win_blink_rel on tryserver.blink
(http://build.chromium.org/p/tryserver.blink/builders/win_blink_rel/builds/42056)

[sof, 2014-12-16 16:10:50]

The CQ bit was checked by sigbjornf@opera.com

[commit-bot: I haz the power, 2014-12-16 16:11:45]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/735263002/1

[commit-bot: I haz the power, 2014-12-16 17:27:49]

Committed patchset #1 (id:1) as
https://src.chromium.org/viewvc/blink?view=rev&revision=187276