Extensions Docs Server: Support APIs with properties

chrome/common/extensions/docs/server2/static/css/api.css

 .type_name,
 .variable,
 .property {
   font-style: italic;
 }
 
 .api_reference div.summary {
   border: 1px solid #93B4D9;
   font-family: "Courier New", courier, monospace;
   padding: 0.5em 0.5em 0.5em 2em;
   text-indent: -1.5em;
   background-color: #CADEF4;
   margin-top: 1em;
 }
 
+.api_reference div.summary:first-letter {
+  text-transform: lowercase;
+}
+
 .api_reference div.description {
   margin-left: 2em;
 }
 
 div.summary .subdued {
   color: #dfc9fb;
 }
 
 .optional {
   color: #7D7D7D;
@@ skipping 29 matching lines @@
   margin: .4em 0 0 1em;
 }
 
 #toc ol li ol {
   margin: 0;
 }
 
 #toc ol li ol li {
   margin: .1em 0 0 1em;
 }