Apps are not opening in Mac

Google Chrome and other apps are not opening, they just bounce and then stop without giving me any error message.

I also re-downloaded Google Chrome and still not opening.

Recently I installed windows 8 via bootcamp and I had to delete lots of useless files I maybe deleted an important file by accident.

Here is a screenshot of the files that won't get deleted from my trash.(possibly important)

Please help me with this problem. And if it requires terminal I'm fine with it. I'm running OS X Yosemite Version 10.10.1 MacBook Pro (15-inch, Mid 2012)