Well, this is pretty straightforward. If Chrome's Developer Tools is showing me that a style is overridden, how to see what CSS rule is overriding it?
I want to know if is there anything like "Show me what overrides this".
OBS: Please, don't point me to Firebug.
Use the Computed Style panel of the element inspector. Expand the property of interest to see the list of applicable rules, and which one won.