Bug 305881 depends on 5 bugs:

•    305881: [appearance: base] Implement appearance base for slider controls [NEW; assigned to webkit-unassigned]
  •    305895: [appearance: base] Create shadow trees for base slider controls [NEW; assigned to sabouhallawa]
  •    305898: [appearance: base] Add default base properties for slider controls in UA style sheet [NEW; assigned to webkit-unassigned]
  •    305899: [appearance: base] Follow up the specs for the pseudo classes of the meter gauge regions [NEW; assigned to webkit-unassigned]
  •    305896: [appearance: base] Add support for the pseudo elements ::fill, ::track and ::thumb [RESOLVED FIXED; assigned to sabouhallawa]
  •    306456: [appearance: base] Remove the feature flag ThumbAndTrackPseudoElementsEnabled [RESOLVED FIXED; assigned to sabouhallawa]

Bug 305881 blocks one bug:

•    305881: [appearance: base] Implement appearance base for slider controls [NEW; assigned to webkit-unassigned]
  •    305601: [appearance: base] Implement appearance: base for form controls [NEW; assigned to webkit-unassigned]