Move extensions APIPermissionSet tests to extensions_unittests

Move extensions APIPermissionSet tests to extensions_unittests

They don't need to run in Chrome's unit_tests suite.

Moved a test for a one-off filesystem permission hack into Chrome's
PermissionsTest because the filesystem API lives in src/chrome.

BUG=397165
TEST=extensions_unittests

Committed: https://crrev.com/fe42c5547a37c12914164588e56546767d9c6bfd
Cr-Commit-Position: refs/heads/master@{#294064}

[James Cook, 2014-09-09 23:19:20]

jamescook@chromium.org changed reviewers:
+ yoz@chromium.org

[James Cook, 2014-09-09 23:19:21]

yoz, PTAL.

tfarina, FYI

https://codereview.chromium.org/553153005/diff/20001/chrome/common/extensions...
File chrome/common/extensions/permissions/permission_set_unittest.cc (right):

https://codereview.chromium.org/553153005/diff/20001/chrome/common/extensions...
chrome/common/extensions/permissions/permission_set_unittest.cc:809: // The file
system permissions have a special-case hack to show a warning for
I moved this here because src/extensions doesn't have the filesystem API and
sammc's hack relates to the messages tested above.

[Yoyo Zhou, 2014-09-10 00:07:59]

LGTM

[Yoyo Zhou, 2014-09-10 00:08:22]

The CQ bit was checked by yoz@chromium.org

[commit-bot: I haz the power, 2014-09-10 00:14:38]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/jamescook@chromium.org/553153005/20001

[tfarina, 2014-09-10 00:18:59]

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

[tfarina, 2014-09-10 00:19:00]

lgtm (rubber-stamp)

[commit-bot: I haz the power, 2014-09-10 01:25:35]

Committed patchset #2 (id:20001) as f93807c38430329083bee7c719040d4388408733

[commit-bot: I haz the power, 2014-09-10 03:57:21]

Patchset 2 (id:??) landed as
https://crrev.com/fe42c5547a37c12914164588e56546767d9c6bfd
Cr-Commit-Position: refs/heads/master@{#294064}