Alternatively you can just doubleclick the css text inside the Resources tab.. and start editing it live. All your styles will be interpreted live. When you're done hit ctrl-S.
You can then rightclick the file and save it back to disk.
That way you dont even need to switch over to your IDE because you can tackle the whole experience without reloading the page at all.
Give that a shot.
Also in the meantime, you can check out this bookmarklet that does more or less what you want...
There was a discussion earlier about adding such a button to devtools, so that could potentially happen as well.
_
Paul
Chrome Developer Advocate