Merge pull request #2423 from fredj/dispose

Dispose the tiles removed from the cache

src/ol/map.js

@@ -330,6 +330,7 @@ ol.Map = function(options) {
    * @private
    */
   this.viewportSizeMonitor_ = new goog.dom.ViewportSizeMonitor();
+  this.registerDisposable(this.viewportSizeMonitor_);
 
   goog.events.listen(this.viewportSizeMonitor_, goog.events.EventType.RESIZE,
       this.updateSize, false, this);

src/ol/tilecache.js

@@ -48,7 +48,7 @@ ol.TileCache.prototype.expireCache = function(usedTiles) {
     if (zKey in usedTiles && usedTiles[zKey].contains(tile.tileCoord)) {
       break;
     } else {
-      this.pop();
+      this.pop().dispose();
     }
   }
 };
@@ -64,7 +64,7 @@ ol.TileCache.prototype.pruneTileRange = function(tileRange) {
   while (i--) {
     key = this.peekLastKey();
     if (tileRange.contains(ol.TileCoord.createFromString(key))) {
-      this.pop();
+      this.pop().dispose();
     } else {
       this.get(key);
     }