Remove unsafe Send implementation for GlutinCompositorProxy.
Remove unsafe Send implementation for GlutinCompositorProxy.

Send is now implemented for glutin::WindowProxy.

notriddle/servo,upsuper/servo,peterjoel/servo,anthgur/servo,paulrouget/servo,anthgur/servo,dati91/servo,rnestler/servo,avadacatavra/servo,ConnorGBrewster/servo,dsandeephegde/servo,szeged/servo,paulrouget/servo,saneyuki/servo,nrc/servo,mattnenterprise/servo,DominoTree/servo,thiagopnts/servo,rnestler/servo,canaltinova/servo,mbrubeck/servo,saneyuki/servo,canaltinova/servo,canaltinova/servo,larsbergstrom/servo,DominoTree/servo,splav/servo,nnethercote/servo,jimberlage/servo,thiagopnts/servo,szeged/servo,mattnenterprise/servo,cbrewster/servo,thiagopnts/servo,peterjoel/servo,upsuper/servo,larsbergstrom/servo,larsbergstrom/servo,paulrouget/servo,emilio/servo,paulrouget/servo,eddyb/servo,saneyuki/servo,DominoTree/servo,sadmansk/servo,mbrubeck/servo,SimonSapin/servo,jimberlage/servo,eddyb/servo,dati91/servo,SimonSapin/servo,canaltinova/servo,dati91/servo,mattnenterprise/servo,DominoTree/servo,KiChjang/servo,cbrewster/servo,nrc/servo,dati91/servo,nnethercote/servo,rnestler/servo,larsbergstrom/servo,pyfisch/servo,eddyb/servo,DominoTree/servo,cbrewster/servo,rnestler/servo,notriddle/servo,nrc/servo,thiagopnts/servo,splav/servo,pyfisch/servo,CJ8664/servo,anthgur/servo,sadmansk/servo,notriddle/servo,mbrubeck/servo,CJ8664/servo,larsbergstrom/servo,nrc/servo,avadacatavra/servo,anthgur/servo,szeged/servo,fiji-flo/servo,SimonSapin/servo,CJ8664/servo,pyfisch/servo,SimonSapin/servo,KiChjang/servo,sadmansk/servo,upsuper/servo,canaltinova/servo,jimberlage/servo,cbrewster/servo,avadacatavra/servo,larsbergstrom/servo,paulrouget/servo,KiChjang/servo,nnethercote/servo,dsandeephegde/servo,saneyuki/servo,canaltinova/servo,emilio/servo,jimberlage/servo,fiji-flo/servo,mattnenterprise/servo,nrc/servo,emilio/servo,avadacatavra/servo,thiagopnts/servo,eddyb/servo,sadmansk/servo,fiji-flo/servo,pyfisch/servo,paulrouget/servo,splav/servo,DominoTree/servo,peterjoel/servo,szeged/servo,emilio/servo,jimberlage/servo,notriddle/servo,peterjoel/servo,avadacatavra/servo,saneyuki/servo,saneyuki/servo,nnethercote/servo,jimberlage/servo,notriddle/servo,notriddle/servo,rnestler/servo,dsandeephegde/servo,emilio/servo,thiagopnts/servo,peterjoel/servo,KiChjang/servo,fiji-flo/servo,cbrewster/servo,saneyuki/servo,dati91/servo,CJ8664/servo,peterjoel/servo,emilio/servo,thiagopnts/servo,nrc/servo,rnestler/servo,upsuper/servo,larsbergstrom/servo,cbrewster/servo,pyfisch/servo,larsbergstrom/servo,nnethercote/servo,SimonSapin/servo,eddyb/servo,mattnenterprise/servo,dsandeephegde/servo,SimonSapin/servo,pyfisch/servo,jimberlage/servo,szeged/servo,emilio/servo,szeged/servo,mbrubeck/servo,splav/servo,eddyb/servo,avadacatavra/servo,peterjoel/servo,cbrewster/servo,ConnorGBrewster/servo,nrc/servo,pyfisch/servo,ConnorGBrewster/servo,nnethercote/servo,DominoTree/servo,CJ8664/servo,dsandeephegde/servo,pyfisch/servo,upsuper/servo,SimonSapin/servo,szeged/servo,SimonSapin/servo,paulrouget/servo,fiji-flo/servo,dsandeephegde/servo,pyfisch/servo,eddyb/servo,larsbergstrom/servo,jimberlage/servo,notriddle/servo,KiChjang/servo,nnethercote/servo,mbrubeck/servo,DominoTree/servo,mbrubeck/servo,mattnenterprise/servo,dati91/servo,KiChjang/servo,dati91/servo,CJ8664/servo,CJ8664/servo,splav/servo,fiji-flo/servo,mbrubeck/servo,szeged/servo,dati91/servo,pyfisch/servo,anthgur/servo,KiChjang/servo,anthgur/servo,avadacatavra/servo,splav/servo,dsandeephegde/servo,peterjoel/servo,upsuper/servo,ConnorGBrewster/servo,sadmansk/servo,paulrouget/servo,canaltinova/servo,sadmansk/servo,jimberlage/servo,larsbergstrom/servo,sadmansk/servo,anthgur/servo,peterjoel/servo,eddyb/servo,sadmansk/servo,DominoTree/servo,rnestler/servo,szeged/servo,DominoTree/servo,ConnorGBrewster/servo,ConnorGBrewster/servo,fiji-flo/servo,KiChjang/servo,saneyuki/servo,splav/servo,upsuper/servo,KiChjang/servo,cbrewster/servo,nnethercote/servo,anthgur/servo,nnethercote/servo,splav/servo,notriddle/servo,notriddle/servo,ConnorGBrewster/servo,thiagopnts/servo,avadacatavra/servo,nnethercote/servo,szeged/servo,fiji-flo/servo,mattnenterprise/servo,canaltinova/servo,saneyuki/servo,peterjoel/servo,splav/servo,paulrouget/servo,notriddle/servo,emilio/servo,mbrubeck/servo,saneyuki/servo,KiChjang/servo,emilio/servo,splav/servo,rnestler/servo,mattnenterprise/servo,emilio/servo,CJ8664/servo,dsandeephegde/servo,upsuper/servo,paulrouget/servo,ConnorGBrewster/servo