Google has introduced an updated version of its URL removal tool in Webmaster Tools, aimed at make it easier to request updates based on changes on other people’s websites
This tool is useful for removals on other peoples’ websites. You could use this tool if a page has been removed completely, or if it was just changed and you need to have the snippet & cached page removed. If you’re the webmaster of the site, then using the Webmaster Tools URL removal feature is faster & easier.