RE: [css-shapes][css-values] getComputedStyle for Percentages used as length

After some discussion with Tab, it appears that getComputedStyle does not return the used style anymore, but some intermediate concept called the resolved style:

# http://dev.w3.org/csswg/cssom/#resolved-values

However, all documentation I can find actually says it returns the final used value:

# https://developer.mozilla.org/en-US/docs/Web/API/window.getComputedStyle
# http://docs.webplatform.org/wiki/css/cssom/methods/getComputedStyle
# http://msdn.microsoft.com/en-us/library/ie/ff975168%28v=vs.85%29.aspx
# 
# The returned object actually represents the CSS 2.1 used values, not the computed values. 

We should probably update those docs. I volunteer for doing the change, is it alright or is it premature?