[ServiceWorker] Check ignore_certificate_errors flag in ServiceWorkerWriteToCacheJob

[ServiceWorker] Check ignore_certificate_errors flag in ServiceWorkerWriteToCacheJob.

https://codereview.chromium.org/643773004 broke LayoutTest fetch-mixed-content.html.

While executing LayoutTest, ignore_certificate_errors is set in LayoutTestBrowserContext.
So every cert errors are ignored in HttpStreamFactoryImpl::Job::HandleCertificateError.

At this case we should also ignore the cert errors in ServiceWorkerWriteToCacheJob.

BUG=426047, 425396
Committed: https://crrev.com/ee19788135cd12b718feed2550ae5a98dc78abdb
Cr-Commit-Position: refs/heads/master@{#300989}

[horo, 2014-10-23 04:56:16]

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

[horo, 2014-10-23 04:56:17]

michaeln@
Could you please review this?

[michaeln, 2014-10-23 21:06:24]

nice, lgtm

[horo, 2014-10-23 22:26:01]

The CQ bit was checked by horo@chromium.org

[commit-bot: I haz the power, 2014-10-23 22:27:02]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/664343005/1

[commit-bot: I haz the power, 2014-10-23 23:52:21]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-10-23 23:52:38]

Patchset 1 (id:??) landed as
https://crrev.com/ee19788135cd12b718feed2550ae5a98dc78abdb
Cr-Commit-Position: refs/heads/master@{#300989}