Move .js files to their own directory

experimental/SkV8Example/js/speed.js

 /**
  * @fileoverview Sample onDraw script for use with SkV8Example.
  */
 var onDraw = function(){
   var tick = 0;
   function f(canvas) {
     tick += 0.1;
     canvas.fillStyle = '#0000ff';
     canvas.fillRect(100, 100, Math.sin(tick)*100, Math.cos(tick)*100);
     inval();
   };
 
   function onTimeout() {
       print(tick*10, " FPS");
       setTimeout(onTimeout, 1000);
       tick=0;
   }
 
   setTimeout(onTimeout, 1000);
 
   return f;
 }();