Bug 950523 - Part 1: Rename nsDOMMediaQueryList to mozilla::dom::MediaQueryList; r=bzbarsky

--HG--
rename : layout/style/nsDOMMediaQueryList.cpp => layout/style/MediaQueryList.cpp
rename : layout/style/nsDOMMediaQueryList.h => layout/style/MediaQueryList.h
Bug 950523 - Part 2: Move MediaQueryList to WebIDL bindings; r=bzbarsky