/usr/share/glib-2.0/schemas/com.canonical.Unity.Greeter.Broadcast.gschema.xml is in unity-greeter-session-broadcast 0.1+14.04.20140324-0ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 | <schemalist>
<schema id="com.canonical.Unity.Greeter.Broadcast" path="/com/canonical/Unity/Greeter/Broadcast/" gettext-domain="unity-greeter-session-broadcast">
<key name="allow-start-url" type="b">
<summary>Allow the Greeter to start URLs in this session</summary>
<description>
The key controls whether the service in the session will listen
for and react to the request from the greeter to start an url
from the greeter.
</description>
<default>true</default>
</key>
</schema>
</schemalist>
|