To find out Google Chrome's total (quite heavy) memory usage in Fedora u can use this command on the terminal

ps axv | grep chrome | awk '{sum+=$9} END {print sum}'

It basically sums up memory usage (in percent), filters and adds using awk to display final result as something like this 11.8

Chrome is great, blah blah.. But I don't see web developers will use Google Chrome while developing until they have some addons like Firefox sports. Some of the life savers required are

1. Live HTTP Headers
2. Firebug
3. Web Developer Toolbar