Service Worker: Clients.matchAll() IDL nit

Service Worker: Clients.matchAll() IDL nit

Make the returned promise's type of Clients.matchAll() method non-nullable.

Spec: https://slightlyoff.github.io/ServiceWorker/spec/service_worker/index.html#clients-interface

BUG=N/A

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=196394

[jungkees, 2015-06-03 02:05:19]

jungkee.song@samsung.com changed reviewers:
+ falken@chromium.org, kinuko@chromium.org

[jungkees, 2015-06-03 02:10:13]

IDL nit per spec. The caller of the callback
(ServiceWorkerScriptContext::OnDidGetClients) is passing an empty vector to the
callback already (instead of nullptr). so it seems fine to change the IDL. PTAL.

[kinuko, 2015-06-03 05:58:39]

lgtm

[jungkees, 2015-06-03 07:10:17]

The CQ bit was checked by jungkee.song@samsung.com

[commit-bot: I haz the power, 2015-06-03 07:10:42]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1147263004/1

[commit-bot: I haz the power, 2015-06-03 10:07:43]

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

[commit-bot: I haz the power, 2015-06-03 10:07:44]

Try jobs failed on following builders:
  win_blink_rel on tryserver.blink (JOB_FAILED,
http://build.chromium.org/p/tryserver.blink/builders/win_blink_rel/builds/64972)

[jungkees, 2015-06-03 10:24:00]

The CQ bit was checked by jungkee.song@samsung.com

[commit-bot: I haz the power, 2015-06-03 10:24:20]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1147263004/1

[commit-bot: I haz the power, 2015-06-03 11:33:51]

Committed patchset #1 (id:1) as
https://src.chromium.org/viewvc/blink?view=rev&revision=196394