Windows XP extended support ends on April 8, 2014. That means Microsoft will stop providing support and patches for the OS, including Internet Explorer, but you can be sure some individuals and businesses will keep running XP even after that point. Google is trying to take advantage of that by announcing that it will provide updates for Chrome for a full year after the XP retirement date.
A post on the Google Enterprise Blog confirms that plan:
Since unpatched browser bugs are often used by malware to infect computers, we’re extending support for Chrome on Windows XP, and will continue to provide regular updates and security patches until at least April 2015.
While it's useful to know that there will be a more secure browser option available for XP sites, it's likely that businesses still running XP at this point are also using the default browser. Google's Legacy Browser support extension, which makes Chrome the primary browser but allows IE to be used for specific sites, is one option there. Nonetheless, sticking with XP after April 2014 seems an unwise policy from a security point of view.