This is a Chrome extenstion which helps you clearing DNS cache by one click. By using it, you don't need to open the page(chrome://net-internals/#dns) and click the button "clear host cache" any more.
Notice: To use it, it requires command line flag --enable-benchmarking when you start the chrome browser.
Chrome Web Store Page: https://chrome.google.com/webstore/detail/fegcjmebpcoihkfdjilmnemfkgjbneol
Source code: https://github.com/swaydeng/DNS-Flusher