content: permissions: add plumbing to request permissions

content: permissions: add plumbing to request permissions

This is part of a three sided change:
https://codereview.chromium.org/1236003004
https://codereview.chromium.org/1240783002 (this)
https://codereview.chromium.org/1248703002

BUG=510405
Committed: https://crrev.com/3d05e9ae66ac77cef754bbdd26757e1d97f0b449
Cr-Commit-Position: refs/heads/master@{#341311}

[Lalit Maganti, 2015-07-21 15:27:22]

lalitm@google.com changed reviewers:
+ mlamouri@chromium.org

[mlamouri (slow - plz ping), 2015-07-24 14:24:59]

lgtm

[Lalit Maganti, 2015-07-24 14:26:52]

The CQ bit was checked by lalitm@google.com

[Lalit Maganti, 2015-07-24 14:26:52]

The patchset sent to the CQ was uploaded after l-g-t-m from
mlamouri@chromium.org
Link to the patchset: https://codereview.chromium.org/1240783002/#ps20001
(title: "Rebase")

[commit-bot: I haz the power, 2015-07-24 14:27:01]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1240783002/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1240783002/20001

[Lalit Maganti, 2015-07-24 14:34:08]

The CQ bit was unchecked by lalitm@google.com

[dgrogan, 2015-07-24 16:37:22]

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

[dgrogan, 2015-07-24 16:37:22]

Looks like fixing this should be easy, it's just WebPermissionQueryCallback
rename.

[Lalit Maganti, 2015-07-31 10:33:41]

The CQ bit was checked by lalitm@google.com

[Lalit Maganti, 2015-07-31 10:33:41]

The patchset sent to the CQ was uploaded after l-g-t-m from
mlamouri@chromium.org
Link to the patchset: https://codereview.chromium.org/1240783002/#ps60001
(title: "Fix build")

[commit-bot: I haz the power, 2015-07-31 10:33:50]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1240783002/60001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1240783002/60001

[commit-bot: I haz the power, 2015-07-31 10:53:53]

Committed patchset #4 (id:60001)

[commit-bot: I haz the power, 2015-07-31 10:54:26]

Patchset 4 (id:??) landed as
https://crrev.com/3d05e9ae66ac77cef754bbdd26757e1d97f0b449
Cr-Commit-Position: refs/heads/master@{#341311}