[ServiceWorker] Fix ExtendableMessageEvent idl binding

[ServiceWorker] Fix ExtendableMessageEvent idl binding

Spec:
https://w3c.github.io/ServiceWorker/#extendablemessageevent-interface

ExtendableMessageEventInit.ports should NOT allow null,
ExtendableMessageEvent.ports should be empty array by default.

BUG=702352, 702361
TEST=blink_tests
external/wpt/service-workers/service-worker/ServiceWorkerGlobalScope/extendable-message-event-constructor.https.html

Review-Url: https://codereview.chromium.org/2904563004
Cr-Commit-Position: refs/heads/master@{#474528}
Committed: https://chromium.googlesource.com/chromium/src/+/2b468e6409c8077f9588eaadd33fa3c493bcaebf

[leonhsl(Using Gerrit), 2017-05-24 09:07:35]

The CQ bit was checked by leon.han@intel.com to run a CQ dry run

[commit-bot: I haz the power, 2017-05-24 09:07:54]

Dry run: CQ is trying da patch.

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

[leonhsl(Using Gerrit), 2017-05-24 09:25:27]

leon.han@intel.com changed reviewers:
+ falken@chromium.org, shimazu@chromium.org

[leonhsl(Using Gerrit), 2017-05-24 09:25:27]

PTAL, Thanks!

# Locally confirmed corresponding wpt test PASS.

[commit-bot: I haz the power, 2017-05-24 11:14:01]

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

[commit-bot: I haz the power, 2017-05-24 11:14:02]

Dry run: This issue passed the CQ dry run.

[falken, 2017-05-25 00:34:40]

lgtm, great

[shimazu, 2017-05-25 02:13:22]

lgtm2, thanks:)

[shimazu, 2017-05-25 02:13:44]

On 2017/05/25 02:13:22, shimazu wrote:
> lgtm2, thanks:)

lgtm too.

[leonhsl(Using Gerrit), 2017-05-25 02:18:37]

The CQ bit was checked by leon.han@intel.com

[commit-bot: I haz the power, 2017-05-25 02:19:38]

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, 2017-05-25 02:25:05]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1495678717808960, "parent_rev":
"7a6de50a928be5382714446119f704df13973205", "commit_rev":
"2b468e6409c8077f9588eaadd33fa3c493bcaebf"}

[commit-bot: I haz the power, 2017-05-25 02:25:16]

Description was changed from

==========
[ServiceWorker] Fix ExtendableMessageEvent idl binding

Spec:
https://w3c.github.io/ServiceWorker/#extendablemessageevent-interface

ExtendableMessageEventInit.ports should NOT allow null,
ExtendableMessageEvent.ports should be empty array by default.

BUG=702352, 702361
TEST=blink_tests
external/wpt/service-workers/service-worker/ServiceWorkerGlobalScope/extendable-message-event-constructor.https.html
==========

to

==========
[ServiceWorker] Fix ExtendableMessageEvent idl binding

Spec:
https://w3c.github.io/ServiceWorker/#extendablemessageevent-interface

ExtendableMessageEventInit.ports should NOT allow null,
ExtendableMessageEvent.ports should be empty array by default.

BUG=702352, 702361
TEST=blink_tests
external/wpt/service-workers/service-worker/ServiceWorkerGlobalScope/extendable-message-event-constructor.https.html

Review-Url: https://codereview.chromium.org/2904563004
Cr-Commit-Position: refs/heads/master@{#474528}
Committed:
https://chromium.googlesource.com/chromium/src/+/2b468e6409c8077f9588eaadd33f...
==========

[commit-bot: I haz the power, 2017-05-25 02:25:17]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/2b468e6409c8077f9588eaadd33f...