[ServiceWorker] Set setSkipServiceWorker flag of the request from NPAPI plugins

[ServiceWorker] Set setSkipServiceWorker flag of the request from NPAPI plugins

We should not support ServiceWorker for NPAPI plugins.
It is because ServiceWorker can mislead these plugins and can cause security problems.

This CL sets setSkipServiceWorker flag at the constructor of PluginURLFetcher and WebPluginImpl::InitiateHTTPRequest() and WebPluginImpl::RouteToFrame().

BUG=413094
Committed: https://crrev.com/9b4a861e8438048e06bd8d89da8e6ab635553e19
Cr-Commit-Position: refs/heads/master@{#297616}

[horo, 2014-09-30 05:54:47]

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

[horo, 2014-09-30 05:54:48]

michaeln@
Could you please review this?

[michaeln, 2014-09-30 19:52:43]

lgtm

[horo, 2014-10-01 00:18:35]

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

[horo, 2014-10-01 00:18:35]

jochen@
Could you please review this?

[jochen (gone - plz use gerrit), 2014-10-01 07:41:33]

lgtm

[horo, 2014-10-01 07:49:31]

The CQ bit was checked by horo@chromium.org

[commit-bot: I haz the power, 2014-10-01 07:50:30]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/618583003/1

[commit-bot: I haz the power, 2014-10-01 09:14:44]

Committed patchset #1 (id:1) as adb02dd4884772db3ca1108343a5cabef6d0ff2f

[commit-bot: I haz the power, 2014-10-01 09:15:22]

Patchset 1 (id:??) landed as
https://crrev.com/9b4a861e8438048e06bd8d89da8e6ab635553e19
Cr-Commit-Position: refs/heads/master@{#297616}