The problem, of course, is case-sensitivity. The billboard gives the URL http://www.google.co.in/Chrome, when it needs to give the URL http://www.google.co.in/chrome. It's such a small mistake, right? In terms of results, it's like a GPS pointing you to Sacramento instead of Los Angeles.
Of course, as one commenter points out snarkily, if the first attempt lands you on a 404 error page, you might have to search for the actual URL, using Google search, which is, after all, it's primary business.