Allow Blink to respond asynchronously to SW Push events (side 1/3)

Allow Blink to respond asynchronously to SW Push events (side 1/3)

This will be necessary once Push events support event.waitUntil to keep
the Service Worker alive until the Promise is resolved
(https://github.com/w3c/push-api/issues/85).

Required by Blink https://codereview.chromium.org/709103002

BUG=430888, 401438
Committed: https://crrev.com/22e04357bc9bcfe37aa8de313fe7081944daadda
Cr-Commit-Position: refs/heads/master@{#303365}

[johnme, 2014-11-07 18:40:55]

johnme@chromium.org changed reviewers:
+ michaeln@chromium.org

[Michael van Ouwerkerk, 2014-11-07 18:59:06]

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

[Michael van Ouwerkerk, 2014-11-07 18:59:06]

https://codereview.chromium.org/708913003/diff/1/content/renderer/service_wor...
File content/renderer/service_worker/embedded_worker_context_client.cc (right):

https://codereview.chromium.org/708913003/diff/1/content/renderer/service_wor...
content/renderer/service_worker/embedded_worker_context_client.cc:322:
blink::WebServiceWorkerEventResult result) {
Might add something like "TODO: implement after dependencies have landed".

[michaeln, 2014-11-08 00:19:17]

lgtm 3

[johnme, 2014-11-08 01:00:56]

The CQ bit was checked by johnme@chromium.org

[commit-bot: I haz the power, 2014-11-08 01:02:24]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/708913003/1

[commit-bot: I haz the power, 2014-11-08 02:53:20]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-11-08 02:54:19]

Patchset 1 (id:??) landed as
https://crrev.com/22e04357bc9bcfe37aa8de313fe7081944daadda
Cr-Commit-Position: refs/heads/master@{#303365}