http://trac.webkit.org/browser/trunk/WebCore/css/CSSStyleSelector.cpp "HTML preview not available, since the file size exceeds 262144 bytes." We should break this giant file into smaller pieces.
See bug 27753, bug 46593, bug 46592, bug 17653 and bug 42764 about related cleanup. :)
http://trac.webkit.org/browser/trunk/Source/WebCore/css/CSSStyleSelector.cpp works these days, so closing. :)