Remove unused ResourceLoaderOptions functionality.

Remove unused ResourceLoaderOptions functionality.

Retire the enumerations ClientCrossOriginCredentialPolicy and
SecurityCheckPolicy, and their storage on the resource loader options
struct. Neither is made use of during resource loading.

The propagation of a SecurityCheckPolicy setting when issuing a load
request by the 'threadable' document loaders is as a result also no
longer done.

R=
BUG=

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=167237

[sof, 2014-02-14 19:05:42]

When you have a moment, please take a look.

[sof, 2014-02-14 19:06:17]

When you have a moment, please take a look.

[Nate Chapin, 2014-02-14 19:09:03]

lgtm

[commit-bot: I haz the power, 2014-02-14 19:09:09]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/sigbjornf@opera.com/167293003/1

[commit-bot: I haz the power, 2014-02-14 22:55:47]

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

[commit-bot: I haz the power, 2014-02-14 22:55:48]

Retried try job too often on linux_blink for step(s) webkit_tests
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=linux_blin...

[sof, 2014-02-15 06:15:00]

The CQ bit was checked by sigbjornf@opera.com

[commit-bot: I haz the power, 2014-02-15 06:15:12]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/sigbjornf@opera.com/167293003/1

[commit-bot: I haz the power, 2014-02-15 18:33:12]

Change committed as 167237