Add API's such as "modifierKeyDown", "modifierKeyUp" for ALT, CTRL, SHIFT, CMD key press.

[ckn476]

Add API's such as "modifierKeyDown", "modifierKeyUp" for ALT, CTRL, SHIFT, CMD key press.

Some of the testcases in Ninja do require these key presses for testing.

[irinamok]

Zack, can you get it implemented in M10 timeframe? Ninja needs this API.

[zacharyc]

I could potentially get this done if I were to drop the architecture project for at least a couple of days. I'm just starting to make some serious progress on the architecture project so I would be against stepping away from it. I'd recommend we wait until we have Eliseo back on screening.