Auto merge of #17526 - hiikezoe:check-has_new_animation_style, r=birtles
Auto merge of #17526 - hiikezoe:check-has_new_animation_style, r=birtles

Check has_new_animation_style along with for_css_rule_changes() in ne…

…eds_animations_update().

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https://bugzilla.mozilla.org/show_bug.cgi?id=1375787

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- [X] `./mach build -d` does not report any errors
- [X] `./mach test-tidy` does not report any errors

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