Frame plugin for Internet Explorer 6, 7, 8, and 9 is obsolete, says Google.
Google is retiring Frame, a browser plugin for Internet Explorer (IE) that run Chrome's rendering engine on sites or web apps that Microsoft's browser didn't support.
Google released Frame in 2009 as a way to help developers who used modern web technologies to reach IE users without having to rewrite their web apps for Microsoft's browser. One example is the now retired Google Wave, which could be viewed in IE with the help of Frame.
Read more at: http://www.zdnet.com/google-retiring-chrome-frame-plugin-for-old-ie-7000016843/