Google and Adobe are getting along swimmingly these days. In the mobile space, Android is the only platform that currently has full Flash support, and now Google's desktop browser has the Flash Player built in. The newest stable version of Chrome 5.0.376.86 has Adobe Flash by default. This feature was present in the beta and developer channels at various times recently, but now it is rolled out everywhere.
Many developers and consumers feel Flash is too resource intensive, and should be replaced by HTML5 standards. Interestingly, Google is one company pushing HTML5 quite hard. It seems they are willing to support multiple standards for the benefit of users who, like it or not, need to use Flash content from time to time.
Users who don't want the plug-in for whatever reason can disable it. Type about:plugins into the address bar and hit enter. From this page, you can turn off Flash, or any other plug-ins you don't want.