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

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

Index: chrome/common/extensions/docs/templates/private/callback.html
diff --git a/chrome/common/extensions/docs/templates/private/callback.html b/chrome/common/extensions/docs/templates/private/callback.html
index 2c1d73ed603c7fdc50d2de305ce303b8077556ee..8666da5753615c3716a901d7042761262917538a 100644
--- a/chrome/common/extensions/docs/templates/private/callback.html
+++ b/chrome/common/extensions/docs/templates/private/callback.html
@@ -1,5 +1,4 @@
 {{#callback}}
-<h4>Callback</h4>
 <p>
   {{?optional}}
       If you specify the <em>{{name}}</em> parameter, it should
@@ -18,7 +17,7 @@
 {{?parameters}}
 <dl>
   {{#p:parameters}}
-    {{+partials.parameter_full parameter:p/}}
+    {{+partials.parameter_full parameter:p parentName:name hideParamTOC:true /}}
   {{/parameters}}
 </dl>
 {{/parameters}}