Revert of Fix the Copresence permission.

Revert of Fix the Copresence permission. (patchset #1 of https://codereview.chromium.org/523433002/)

Reason for revert:
This change causes a test failure:

http://build.chromium.org/p/chromium.chromiumos/builders/Linux%20ChromiumOS%20Tests%20%281%29/builds/48008/steps/unit_tests/logs/stdio

Error:

[ RUN      ] PermissionsTest.PermissionMessages
../../chrome/common/extensions/permissions/permission_set_unittest.cc:781: Failure
Value of: permission_info->message_id()
Actual: 65
Expected: PermissionMessage::kNone
Which is: 1
unexpected message_id for copresence

Looks like this change is the cause.

Original issue's description:
> Fix the Copresence permission.
> 
> The initializer for the Copresence permission is malformed. It specifies the
> message id instead of the flag.
> 
> R=kalman@chromium.org
> BUG=408843
> 
> Committed to pending queue: https://chromium.googlesource.com/chromium/src/+/c2a41e8

TBR=kalman@chromium.org,rkc@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=408843
Committed: https://crrev.com/7b723d5ca9bcd0b3e7619c08b4284e97ffc25d31
Cr-Commit-Position: refs/heads/master@{#292532}

[Alpha Left Google, 2014-08-29 01:10:24]

Created Revert of Fix the Copresence permission.

[commit-bot: I haz the power, 2014-08-29 01:11:07]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/hclam@chromium.org/520493002/1

[commit-bot: I haz the power, 2014-08-29 01:12:04]

Committed patchset #1 (id:1) as e1a8808d65d8eb1471b6094ea77bb157c3d7c985

[commit-bot: I haz the power, 2014-09-10 03:04:41]

Patchset 1 (id:??) landed as
https://crrev.com/7b723d5ca9bcd0b3e7619c08b4284e97ffc25d31
Cr-Commit-Position: refs/heads/master@{#292532}