style: Add @-moz-document media-document(image|video|plugin).
style: Add @-moz-document media-document(image|video|plugin).

Bug: 1475511
Reviewed-by: xidorn
MozReview-Commit-ID: CD3O1vGLAoV

paulrouget/servo,nnethercote/servo,SimonSapin/servo,cbrewster/servo,jimberlage/servo,pyfisch/servo,saneyuki/servo,dati91/servo,jimberlage/servo,jimberlage/servo,nnethercote/servo,DominoTree/servo,pyfisch/servo,splav/servo,larsbergstrom/servo,cbrewster/servo,splav/servo,peterjoel/servo,jimberlage/servo,pyfisch/servo,szeged/servo,larsbergstrom/servo,emilio/servo,notriddle/servo,SimonSapin/servo,pyfisch/servo,larsbergstrom/servo,splav/servo,szeged/servo,KiChjang/servo,nnethercote/servo,cbrewster/servo,SimonSapin/servo,nnethercote/servo,szeged/servo,paulrouget/servo,dati91/servo,DominoTree/servo,peterjoel/servo,peterjoel/servo,paulrouget/servo,KiChjang/servo,dati91/servo,notriddle/servo,larsbergstrom/servo,KiChjang/servo,ConnorGBrewster/servo,notriddle/servo,nnethercote/servo,sadmansk/servo,emilio/servo,SimonSapin/servo,dati91/servo,dati91/servo,emilio/servo,szeged/servo,DominoTree/servo,jimberlage/servo,notriddle/servo,sadmansk/servo,KiChjang/servo,pyfisch/servo,DominoTree/servo,peterjoel/servo,sadmansk/servo,pyfisch/servo,szeged/servo,emilio/servo,notriddle/servo,DominoTree/servo,nnethercote/servo,splav/servo,emilio/servo,splav/servo,nnethercote/servo,KiChjang/servo,emilio/servo,cbrewster/servo,splav/servo,nnethercote/servo,peterjoel/servo,DominoTree/servo,dati91/servo,larsbergstrom/servo,notriddle/servo,sadmansk/servo,ConnorGBrewster/servo,KiChjang/servo,emilio/servo,szeged/servo,SimonSapin/servo,saneyuki/servo,DominoTree/servo,saneyuki/servo,cbrewster/servo,splav/servo,pyfisch/servo,larsbergstrom/servo,jimberlage/servo,ConnorGBrewster/servo,larsbergstrom/servo,jimberlage/servo,peterjoel/servo,sadmansk/servo,notriddle/servo,nnethercote/servo,larsbergstrom/servo,dati91/servo,SimonSapin/servo,paulrouget/servo,saneyuki/servo,DominoTree/servo,splav/servo,peterjoel/servo,saneyuki/servo,splav/servo,KiChjang/servo,saneyuki/servo,splav/servo,cbrewster/servo,nnethercote/servo,emilio/servo,cbrewster/servo,peterjoel/servo,szeged/servo,szeged/servo,paulrouget/servo,larsbergstrom/servo,peterjoel/servo,paulrouget/servo,emilio/servo,pyfisch/servo,notriddle/servo,DominoTree/servo,KiChjang/servo,DominoTree/servo,jimberlage/servo,szeged/servo,ConnorGBrewster/servo,pyfisch/servo,SimonSapin/servo,sadmansk/servo,ConnorGBrewster/servo,sadmansk/servo,paulrouget/servo,saneyuki/servo,ConnorGBrewster/servo,dati91/servo,SimonSapin/servo,pyfisch/servo,ConnorGBrewster/servo,cbrewster/servo,peterjoel/servo,jimberlage/servo,paulrouget/servo,paulrouget/servo,notriddle/servo,paulrouget/servo,emilio/servo,KiChjang/servo,szeged/servo,saneyuki/servo,larsbergstrom/servo,notriddle/servo,ConnorGBrewster/servo,KiChjang/servo,saneyuki/servo,sadmansk/servo,saneyuki/servo