let mark_document_with_no_blocked_loads() take a None value silently
let mark_document_with_no_blocked_loads() take a None value silently

KiChjang/servo,peterjoel/servo,splav/servo,szeged/servo,peterjoel/servo,emilio/servo,saneyuki/servo,saneyuki/servo,splav/servo,KiChjang/servo,szeged/servo,szeged/servo,emilio/servo,larsbergstrom/servo,splav/servo,larsbergstrom/servo,nnethercote/servo,DominoTree/servo,KiChjang/servo,larsbergstrom/servo,emilio/servo,larsbergstrom/servo,paulrouget/servo,szeged/servo,paulrouget/servo,nnethercote/servo,pyfisch/servo,pyfisch/servo,paulrouget/servo,larsbergstrom/servo,nnethercote/servo,saneyuki/servo,szeged/servo,paulrouget/servo,nnethercote/servo,notriddle/servo,szeged/servo,larsbergstrom/servo,peterjoel/servo,DominoTree/servo,paulrouget/servo,saneyuki/servo,splav/servo,paulrouget/servo,DominoTree/servo,larsbergstrom/servo,KiChjang/servo,larsbergstrom/servo,paulrouget/servo,pyfisch/servo,larsbergstrom/servo,pyfisch/servo,notriddle/servo,peterjoel/servo,peterjoel/servo,emilio/servo,DominoTree/servo,emilio/servo,pyfisch/servo,szeged/servo,saneyuki/servo,nnethercote/servo,peterjoel/servo,paulrouget/servo,peterjoel/servo,DominoTree/servo,peterjoel/servo,splav/servo,notriddle/servo,pyfisch/servo,DominoTree/servo,notriddle/servo,nnethercote/servo,KiChjang/servo,DominoTree/servo,notriddle/servo,nnethercote/servo,pyfisch/servo,pyfisch/servo,szeged/servo,peterjoel/servo,notriddle/servo,peterjoel/servo,emilio/servo,DominoTree/servo,KiChjang/servo,saneyuki/servo,pyfisch/servo,pyfisch/servo,szeged/servo,DominoTree/servo,emilio/servo,szeged/servo,splav/servo,emilio/servo,saneyuki/servo,KiChjang/servo,notriddle/servo,saneyuki/servo,notriddle/servo,KiChjang/servo,splav/servo,emilio/servo,DominoTree/servo,notriddle/servo,nnethercote/servo,KiChjang/servo,notriddle/servo,paulrouget/servo,nnethercote/servo,splav/servo,saneyuki/servo,emilio/servo,KiChjang/servo,splav/servo,larsbergstrom/servo,nnethercote/servo,saneyuki/servo,splav/servo,paulrouget/servo