Remove obsoleted term, "content_shell".

Remove obsoleted term, "content_shell".

1) Replace android remote debugging unix domain socket path with
   cast_shell_debugging_remote.
2) Fix sandbox permission name correctly.

BUG=425615
Committed: https://crrev.com/1d83ee8d763b534d8088f7b4a922caa0f23cff56
Cr-Commit-Position: refs/heads/master@{#300555}

[byungchul, 2014-10-21 17:56:25]

byungchul@chromium.org changed reviewers:
+ gunsch@chromium.org, lcwu@chromium.org

[lcwu1, 2014-10-21 18:01:03]

lgtm

[gunsch, 2014-10-21 19:15:08]

lgtm

[byungchul, 2014-10-21 20:04:51]

The CQ bit was checked by byungchul@chromium.org

[commit-bot: I haz the power, 2014-10-21 20:06:48]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/637353004/1

[commit-bot: I haz the power, 2014-10-21 21:04:41]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-10-21 21:05:25]

Patchset 1 (id:??) landed as
https://crrev.com/1d83ee8d763b534d8088f7b4a922caa0f23cff56
Cr-Commit-Position: refs/heads/master@{#300555}