Fix a minor doc issue in fps.js

samples/o3djs/fps.js

 /*
  * Copyright 2009, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 127 matching lines @@
  * </script>
  * <div id="o3d" style="width: 600px; height: 600px"></div>
  * </body></html>
  * </pre>
  *
  * @param {!o3d.Pack} pack Pack to create objects in.
  * @param {number} clientWidth width of client area.
  * @param {number} clientHeight Height of client area.
  * @param {!o3d.RenderNode} opt_parent RenderNode to use as parent for
  *     ViewInfo that will be used to render the FPS with.
+ * @return {!o3djs.fps.FPSManager} The created FPSManager.
  */
 o3djs.fps.createFPSManager = function(pack,
                                       clientWidth,
                                       clientHeight,
                                       opt_parent) {
   return new o3djs.fps.FPSManager(pack, clientWidth, clientHeight, opt_parent);
 };
 
 /**
  * A class for displaying frames per second.
@@ skipping 300 matching lines @@
   this.updateTransform_();
 };
 
 /**
  * Sets the color of this ColorRect.
  * @param {!o3djs.math.Vector4} color initial color.
  */
 o3djs.fps.ColorRect.prototype.setColor = function(color) {
   this.colorParam_.value = color;
 };