Bug 883731. Part1 - Remove ResourceLoaded notifications since they don't make much sense with a media cache. r=cpearce
Bug 883731 - Part2 - Remove unnecessary update of readyState and introduce NEXT_FRAME_UNAVAILABLE_SEEKING so that we return HAVE_METADATA while seeking. r=cpearce
Bug 883731 - Part3 - Progress update should be associated with network state transitions. Also centralize network state transition code. r=cpearce
Bug 966168 - Implement symbols() CSS function. r=dbaron
Bug 1072881 - IonMonkey ARM: optimize Float32ToDouble to useAtStart its argument. r=mrosenberg
Bug 1072894 - Implement polygon() parsing for clip-path. r=heycam