Fix a bug where API properties were not showing their type.

Before: http://i.imgur.com/U1IMJZc.png
After: http://i.imgur.com/2uWTmzi.png

NOTRY=true
BUG=246200

Review URL: https://codereview.chromium.org/60703003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@233074 0039d316-1c4b-4281-b951-d872f2087c98

chrome/common/extensions/docs/templates/private/api_property.html

@@ -4,7 +4,7 @@
     <div class="line">{{+partials.api_namespace api:api}}{{name}}</div>
   </div>
   <div>
-    <dt><span class="property">{{name}}</span> {{+partials.type_name link:link}}</dt>
+    <dt><span class="property">{{name}}</span> {{+partials.type_name link:link @:property}}</dt>
     {{?description}}<dd>
       {{{description}}}
     </dd>{{/description}}