For the longest time I thought I just didn't know how to use the app and would "figure it out later". I can close all Chrome tabs on my Nexus4 phone... and on my PC (just by closing the program). After looking around different forums I see that for some reason Google left this feature out of the Android tablet version and people have been asking for it for YEARS. Why on all the other versions and not the tablet version? Sad to have to delete Chrome from a Nexus7, but it leaves so many tabs open when I go back to Flipboard and/or other apps that when I finally realize why I am running slow, I have to close 40-50 tabs one at a time. I don't understand why they won't fix this. So now I need a new browser... Stupid to have to do on a Google machine. :/
**edit
Ok... can't delete it. Guess I need to just make another browser a default. *sigh*