This code had the potential to use an uninitialized m_cx, m_cy. Since it is unused, I'm simply removing it.
Created attachment 32131 [details] patch
Comment on attachment 32131 [details] patch Why not fix the default constructor? I support removing the dead code though. Wow, this code is old. This was from yet-another attempt at animation by yours truly... forever ago. I think you shoudl fix the default constructor to zero everything instead of changing the callsites.
Committed as http://trac.webkit.org/changeset/45448 I did a slight modification to change the default constructor as Eric suggested.