fix for #843 - remove unnecesary url prepping in image tiles

git-svn-id: http://svn.openlayers.org/trunk/openlayers@3768 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Tile/Image.js

@@ -36,9 +36,9 @@ OpenLayers.Tile.Image = OpenLayers.Class(OpenLayers.Tile, {
      */ 
     frame: null, 
 
-    /** TBD 3.0 - reorder the parameters to the init function to put URL 
-     *             as last, so we can continue to call tile.initialize() 
-     *             without changing the arguments. 
+    /** TBD 3.0 - reorder the parameters to the init function to remove 
+     *             URL. the getUrl() function on the layer gets called on 
+     *             each draw() and moveTo(), so no need to specify it here.
      * 
      * Constructor: OpenLayers.Tile.Image
      * Constructor for a new <OpenLayers.Tile.Image> instance.
@@ -47,14 +47,14 @@ OpenLayers.Tile.Image = OpenLayers.Class(OpenLayers.Tile, {
      * layer - {<OpenLayers.Layer>} layer that the tile will go in.
      * position - {<OpenLayers.Pixel>}
      * bounds - {<OpenLayers.Bounds>}
-     * url - {<String>}
+     * url - {<String>} Deprecated. Remove me in 3.0.
      * size - {<OpenLayers.Size>}
      */   
     initialize: function(layer, position, bounds, url, size) {
         OpenLayers.Tile.prototype.initialize.apply(this, arguments);
 
-        this.url = url;
-
+        this.url = url; //deprecated remove me
+        
         this.frame = document.createElement('div'); 
         this.frame.style.overflow = 'hidden'; 
         this.frame.style.position = 'absolute';