Replace 'descriptionStyles' in omnibox API with a simple xml

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

 <script>
 chrome.omnibox.onInputChanged.addListener(
   function(text, suggest) {
     chrome.test.log("onInputChanged: " + text);
     if (text != "suggestio")
       return;
 
-    var desc = 'Description with style: <match>, [dim], (url till end)';  
+    var desc = 'Description with style: <match>&lt;match&gt;</match>, ' +

[Matt Perry, 2010/11/29 22:06:52]

hmm.. one disadvantage of this change is that descriptions from a remote source
will have to be scrubbed for < and > and &.

[Aaron Boodman, 2010/11/30 01:13:57]

True, but that is not too hard to do.

+               '<dim>[dim]</dim>, <url>(url till end)</url>';
     suggest([
       {
         content: text + "n1",
-        description: desc,
-        descriptionStyles: [
-          chrome.omnibox.styleMatch(desc.indexOf('<'), 6),
-          chrome.omnibox.styleDim(desc.indexOf('['), 4),
-          chrome.omnibox.styleUrl(desc.indexOf('(')),
-        ]
+        description: desc
       },
       {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>