Docserver: Fix the TOC rendering for API references by fixing the haphazard way

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

Index: chrome/common/extensions/docs/templates/private/dom_event.html
diff --git a/chrome/common/extensions/docs/templates/private/dom_event.html b/chrome/common/extensions/docs/templates/private/dom_event.html
index bff0e836b2f098837a833a77e05339d32263457e..2ca4941e44b7159f6833c218bdb4a9d0eb09e4b0 100644
--- a/chrome/common/extensions/docs/templates/private/dom_event.html
+++ b/chrome/common/extensions/docs/templates/private/dom_event.html
@@ -1,13 +1,14 @@
 {{#event}}
 <div>
-  <h4 id="{{id}}">{{name}}</h4>
+  <h3 id="{{id}}">{{name}}</h3>
   <div class="description">
     {{?description}}<p>
       {{{description}}}
     </p>{{/description}}
     {{?properties}}
       {{+partials.type_item items:properties
-                            item_partial:partials.parameter_full/}}
+                            item_partial:partials.parameter_full
+                            parentName:name /}}
     {{/properties}}
   </div>
 </div>