Microsoft itself intends to pull update support for XP on April 8th of 2014.
“We recognize that hundreds of millions of users, including a good chunk of current Chrome users, still rely on XP. Moreover, many organizations still run dozens or even hundreds of applications on XP and may have trouble migrating. Our goal is to support Chrome for XP users during this transition process. Most importantly, Chrome on XP will still be automatically updated with the latest security fixes to protect against malware and phishing attacks,” stated Google.
For its part, Microsoft has been urging users to move on from XP for quite a while now, emphasizing that the operating system would become insecure once support is pulled.
Windows XP was originally launched in 2001 and remains popular and widely used despite its old age.