Avoid Polymer.dom.setAttribute when unneeded.
Avoid Polymer.dom.setAttribute when unneeded.

yforrest/polymer,MartinsThiago/polymer,jordanyaker/polymer,Polymer/polymer,MartinsThiago/polymer,gazal-k/polymer,exlerdesigns/polymer,ikeagold/polymer,yforrest/polymer,mgiuffrida/polymer,exlerdesigns/polymer,ikeagold/polymer,JeremybellEU/polymer,ikeagold/polymer,jordanyaker/polymer,yforrest/polymer,gazal-k/polymer,gronke/polymer,gazal-k/polymer,gronke/polymer,JeremybellEU/polymer,Polymer/polymer,gronke/polymer,Endika/polymer,mgiuffrida/polymer,Endika/polymer,exlerdesigns/polymer,tjsavage/polymer,MartinsThiago/polymer,Polymer/polymer,tjsavage/polymer,Endika/polymer,jordanyaker/polymer,JeremybellEU/polymer,tjsavage/polymer,ktiedt/polymer,ktiedt/polymer,ktiedt/polymer,mgiuffrida/polymer