Use interim tiles when changing dynamic parameters

src/ol/structs/lrucache.js

@@ -226,6 +226,16 @@ ol.structs.LRUCache.prototype.pop = function() {
 };
 
 
+/**
+ * @param {string} key Key.
+ * @param {T} value Value.
+ */
+ol.structs.LRUCache.prototype.replace = function(key, value) {
+  this.get(key);  // update `newest_`
+  this.entries_[key].value_ = value;
+};
+
+
 /**
  * @param {string} key Key.
  * @param {T} value Value.