replace 'who()' function with CLASS_NAME member constant. As per email discussion

git-svn-id: http://svn.openlayers.org/trunk/openlayers@52 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Tile.js

@@ -41,7 +41,7 @@ OpenLayers.Tile.prototype = {
     // HACK HACK - should we make it a standard to put this sort of warning
     //             message in functions that are supposed to be overridden?
     //
-    //        ol.Log.warn(this.who() + ": draw() not implemented");
+    //        ol.Log.warn(this.CLASS_NAME + ": draw() not implemented");
 
     },
 
@@ -50,8 +50,6 @@ OpenLayers.Tile.prototype = {
     remove:function() {
     },
 
-
-    ////////////////////
-    who:function(){return "tiled.js";} // last!
+    CLASS_NAME: "OpenLayers.Tile"
 };