Thanks @griffman. I've been playing with different options and have now a working macro similar to yours. Very ugly, but functional.
Instead of using mouse location, I use control + return, I can invoke the right-click context menu on the selected file, and then do a "show in finder", copy the full path, go back to Chrome, and then do what I want on the file.
So yeah, ugly as heck, but working and saving me some clicks and a few seconds on each repetition, which means lots of minutes for lots of files 
Thanks!