Re-configured samples page.

src/site/samples/raf/example/animations.dart

+import "dart:html" as i;class l{static const  m="Chrome";final  k;final  minimumVersion;const l(this.k,[this.minimumVersion]);}class n{const n();}class o{final  name;const o(this.name);}class q{const q();}class s{const s();}class t{final AB=500;var BB;var CB;var DB=0;var EB=false;t(){BB=new List<i.Element>(AB);CB=new List<num>(AB);for(var h=0;h<AB;h++ ){var g=new i.Element.tag("div");g.classes.add("mover");g.style.top="${h*10}px";i.document.body.nodes.add(g);BB[h]=g;}i.window.onScroll.listen((j)=>FB());} FB(){DB=i.window.scrollY;GB();} GB(){if(!EB){i.window.requestAnimationFrame(HB);EB=true;}} HB( u){var j=i.window.innerHeight*0.5;var v=0;for(var g=0;g<BB.length;g++ ){var h=BB[g];CB[g]=h.offsetTop;}for(var g=0;g<BB.length;g++ ){var h=BB[g];if(DB>CB[g]-j){h.classes.add('left');}else{h.classes.remove('left');}}EB=false;}} main(){new t();}