Yeah, having a major issue with Chrome right now, even with addons disabled. Started just the other day when I installed BitDefender, but I've since removed BD, and I'm still having an issue with it.
Basically gets to running at 25-30%, pushing my processor from 38ºC to 56-58ºC. Pages become very slow to load as well, making the internet just about unbearable. In the Chrome task manager, only the Browser is utilizing the heavy CPU usage, not anything else. No clue what could be causing this.