IDL: Support callback interface in overload resolution

IDL: Support callback interface in overload resolution

Per the spec[1] we can treat an object as a callback interface
if an effective overload set contains the callback interface.

[1] http://heycam.github.io/webidl/#es-overloads

BUG=629068
Committed: https://crrev.com/d8a924a2dd4693f40a27b33efc2de3db46a2496e
Cr-Commit-Position: refs/heads/master@{#407077}

[bashi, 2016-07-21 22:47:05]

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

[commit-bot: I haz the power, 2016-07-21 22:47:37]

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

[bashi, 2016-07-21 22:49:50]

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

[commit-bot: I haz the power, 2016-07-21 22:49:56]

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

[bashi, 2016-07-21 23:14:20]

bashi@chromium.org changed reviewers:
+ haraken@chromium.org, yukishiino@chromium.org

[bashi, 2016-07-21 23:14:20]

PTAL

[commit-bot: I haz the power, 2016-07-22 00:09:21]

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

[commit-bot: I haz the power, 2016-07-22 00:09:21]

Dry run: This issue passed the CQ dry run.

[haraken, 2016-07-22 04:32:06]

LGTM

[bashi, 2016-07-22 05:59:56]

The CQ bit was checked by bashi@chromium.org

[commit-bot: I haz the power, 2016-07-22 06:00:17]

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, 2016-07-22 06:04:12]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-07-22 06:06:04]

Description was changed from

==========
IDL: Support callback interface in overload resolution

Per the spec[1] we can treat an object as a callback interface
if an effective overload set contains the callback interface.

[1] http://heycam.github.io/webidl/#es-overloads

BUG=629068
==========

to

==========
IDL: Support callback interface in overload resolution

Per the spec[1] we can treat an object as a callback interface
if an effective overload set contains the callback interface.

[1] http://heycam.github.io/webidl/#es-overloads

BUG=629068

Committed: https://crrev.com/d8a924a2dd4693f40a27b33efc2de3db46a2496e
Cr-Commit-Position: refs/heads/master@{#407077}
==========

[commit-bot: I haz the power, 2016-07-22 06:06:05]

Patchset 2 (id:??) landed as
https://crrev.com/d8a924a2dd4693f40a27b33efc2de3db46a2496e
Cr-Commit-Position: refs/heads/master@{#407077}

[Yuki, 2016-07-22 06:11:56]

lgtm