/usr/share/gconf/schemas/urlscraper.schemas is in xchat-gnome-common 1:0.30.0~git20131003.d20b8d+really20110821-0.2ubuntu12.2.
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 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 | <gconfschemafile>
	<schemalist>
		<schema>
			<key>/schemas/apps/xchat/plugins/urlscraper/history</key>
			<applyto>/apps/xchat/plugins/urlscraper/history</applyto>
			<owner>xchat</owner>
			<type>int</type>
			<default>10</default>
			<gettext_domain>xchat-gnome</gettext_domain>
			<locale name="C">
				<short>URL Scraper history length</short>
			</locale>
		</schema>
		<schema>
			<key>/schemas/apps/xchat/plugins/urlscraper/timestamps</key>
			<applyto>/apps/xchat/plugins/urlscraper/timestamps</applyto>
			<owner>xchat</owner>
			<type>bool</type>
			<default>true</default>
			<gettext_domain>xchat-gnome</gettext_domain>
			<locale name="C">
				<short>URL Scraper show timestamps</short>
			</locale>
		</schema>
	</schemalist>
</gconfschemafile>
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