Mult-touch emulation with chrome dev tools.

[tha...@lucidchart.com]

When emulating a touch device in chrome, it would be really nice if I could simulate pinches, and two-finger swipes using a modifier key and the mouse, like in Apple's iOS simulator.

In the iOS simulator, you can simulate a multi touch by holding down option, and a pinch can be done by holding down option and shift at the same time.

This would make debugging for touch devices much easier.