It's the result of Code Project having Open Search enabled on the site. Chrome implements this feature based on the site owner adding it. BTW, it also works in any browser that supports Open Search, like IE7+ and FF2+. You can see the XML file required to set it up here: http://www.codeproject.com/info/OpenSearch.xml[^]. It's implemented by adding a line to the head
element in the page:
So basically, kudos to Code Project for implementing it, and don't be afraid to put it into use in your own site! There's a full list of providers that support it and instructions on how to set it up yourself at http://www.opensearch.org/Home[^].