New DevTools Screencasting & Emulation features!
Developing for mobile should be just as easy as it is developing for desktop. We've been working hard in the Chrome DevTools to make things easier for you and it's time to unveil some new features that should dramatically improve your mobile web development. First up, remote debugging and then we'll unveil proper mobile emulation.
http://www.html5rocks.com/en/tutorials/developertools/mobile/