Actually register the BroadcastChannel pre-finalizer.

Actually register the BroadcastChannel pre-finalizer.

BroadcastChannel defined a pre-finalizer, but never registered it, so
the finalizer was never being called. This fixes crashes caused by that.

BUG=635577
Committed: https://crrev.com/c48d361b1a4271a871418b7f73029c8e831e45be
Cr-Commit-Position: refs/heads/master@{#411521}

[Marijn Kruisselbrink, 2016-08-11 16:40:28]

The CQ bit was checked by mek@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-08-11 16:41:02]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[Marijn Kruisselbrink, 2016-08-11 17:29:30]

mek@chromium.org changed reviewers:
+ haraken@chromium.org

[commit-bot: I haz the power, 2016-08-11 19:28:03]

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

[commit-bot: I haz the power, 2016-08-11 19:28:04]

Dry run: This issue passed the CQ dry run.

[haraken, 2016-08-12 00:16:05]

LGTM

[Marijn Kruisselbrink, 2016-08-12 02:11:08]

The CQ bit was checked by mek@chromium.org

[commit-bot: I haz the power, 2016-08-12 02:11:38]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-08-12 02:15:11]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-08-12 02:16:31]

Description was changed from

==========
Actually register the BroadcastChannel pre-finalizer.

BroadcastChannel defined a pre-finalizer, but never registered it, so
the finalizer was never being called. This fixes crashes caused by that.

BUG=635577
==========

to

==========
Actually register the BroadcastChannel pre-finalizer.

BroadcastChannel defined a pre-finalizer, but never registered it, so
the finalizer was never being called. This fixes crashes caused by that.

BUG=635577

Committed: https://crrev.com/c48d361b1a4271a871418b7f73029c8e831e45be
Cr-Commit-Position: refs/heads/master@{#411521}
==========

[commit-bot: I haz the power, 2016-08-12 02:16:32]

Patchset 1 (id:??) landed as
https://crrev.com/c48d361b1a4271a871418b7f73029c8e831e45be
Cr-Commit-Position: refs/heads/master@{#411521}