More changes to extension omnibox API for styles.

chrome/test/data/extensions/api_test/omnibox/test.html

 <script>
 if (!chrome.omnibox) {
   chrome.omnibox = chrome.experimental.omnibox;
 }
 
 chrome.omnibox.onInputChanged.addListener(
   function(text, suggest) {
     chrome.test.log("onInputChanged: " + text);
     if (text != "suggestio")
       return;
 
-    var desc = 'Description with style: <match> [dim], none';  
+    var desc = 'Description with style: <match>, [dim], (url till end)';  
     suggest([
       {
         content: text + "n1",
         description: desc,
         descriptionStyles: [
           chrome.omnibox.styleMatch(desc.indexOf('<'), 6),
           chrome.omnibox.styleDim(desc.indexOf('['), 4),
+          chrome.omnibox.styleUrl(desc.indexOf('(')),
         ]
       },
       {content: text + "n2", description: "description2"},
       {content: text + "n3", description: "description3"},
     ]);
   });
 
 chrome.omnibox.onInputEntered.addListener(
   function(text) {
     chrome.test.assertEq("command", text);
     chrome.test.notifyPass();
   });
 
 // Now we wait for the input events to fire.
 chrome.test.notifyPass();
 </script>