Bug 870022 - Part 1 - Split nsAttrValue::StringToInteger out to nsContentUtils, update usage. r=jst
Bug 870022 - Part 2 - Add ParseSourceSizeList to CSS parser for <picture sizes> grammar. r=bz
Bug 870022 - Part 3.1 - Add computed width to ResponsiveImageCandidate and Descriptor parsing. r=jst
Bug 870022 - Part 3.2 - Add sizes support to ResponsiveImageSelector. r=jst
Bug 870022 - Part 4.1 - Add sizes to HTMLImageElement & atoms. r=jst, sr=jst
Bug 870022 - Part 4.2 - Teach parser about sizes attr (non-generated bits). r=hsivonen
Bug 870022 - Part 4.3 - Teach parser about sizes attr (generated bits). r=hsivonen
Bug 870022 - Part 5.1 - Add HTMLPictureElement & atom. r=jst, sr=jst
Bug 870022 - Part 5.2 - Add sizes/srcset to HTMLSourceElement. r=jst, sr=jst
Bug 870022 - Part 5.3 - Teach parser about <picture> (non-generated bits). r=hsivonen
Bug 870022 - Part 5.4 - Teach parser about <picture> (generated bits). r=hsivonen
Bug 870022 - Part 5.5 - Add <picture> to nsHTMLEditUtils. r=ehsan
Bug 870022 - Part 6 - Export MatchesCurrentMedia form HTMLSourceElement, replace usage in HTMLMediaElement. r=cpearce
Bug 870022 - Part 7 - HTMLImageElement - Make <picture> aware, react to <source> tag and sizes attr changes. r=jst
Bug 870022 - Add test for dom.image.picture.enabled. r=bz