Fix browser_tests on 32-bit linux

Fix browser_tests on 32-bit linux.

Missing dtor in WebRTCIceServerArray.

The bug was introduced by https://codereview.chromium.org/1315413004/ but showed in the run of https://codereview.chromium.org/1321543002/.

BUG=webrtc:4517
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=202459

[guoweis_left_chromium, 2015-09-17 04:52:52]

guoweis@chromium.org changed reviewers:
+ thakis@chromium.org, tommi@chromium.org

[guoweis_left_chromium, 2015-09-17 04:53:29]

On 2015/09/17 04:52:52, guoweis_chromium wrote:
> mailto:guoweis@chromium.org changed reviewers:
> + mailto:thakis@chromium.org, mailto:tommi@chromium.org

PTAL.

[tommi (sloooow) - chröme, 2015-09-17 05:46:07]

lgtm

[guoweis_left_chromium, 2015-09-17 06:19:55]

The CQ bit was checked by guoweis@chromium.org

[commit-bot: I haz the power, 2015-09-17 06:20:02]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1349073002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1349073002/1

[commit-bot: I haz the power, 2015-09-17 06:28:50]

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

[commit-bot: I haz the power, 2015-09-17 06:28:50]

Try jobs failed on following builders:
  chromium_presubmit on tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/chromium_presub...)

[guoweis_left_chromium, 2015-09-17 16:13:37]

guoweis@chromium.org changed reviewers:
- thakis@chromium.org, tommi@chromium.org

[guoweis_left_chromium, 2015-09-17 16:13:55]

guoweis@chromium.org changed reviewers:
+ dstockwell@chromium.org

[guoweis_left_chromium, 2015-09-17 16:13:55]

PTAL

[Nico, 2015-09-17 17:52:21]

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

[Nico, 2015-09-17 17:52:21]

rs-lgtm

[guoweis_left_chromium, 2015-09-17 17:57:46]

The CQ bit was checked by guoweis@chromium.org

[commit-bot: I haz the power, 2015-09-17 17:58:06]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1349073002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1349073002/1

[commit-bot: I haz the power, 2015-09-17 18:04:00]

Committed patchset #1 (id:1) as
https://src.chromium.org/viewvc/blink?view=rev&revision=202459