Remove interface for postponing pop events

Author: agundermann

modules/History.js

@@ -84,15 +84,14 @@ class History {
     this._pendingLocation = null;
   }
 
-  handlePop(path, entry={}, applyEntry=null) {
+  handlePop(path, entry={}) {
     var state = null;
     if (entry.key && typeof this.readState === 'function')
       state = this.readState(entry.key);
 
     var pendingLocation = this._createLocation(path, state, entry, NavigationTypes.POP);
 
     this.beforeChange(pendingLocation, () => {
-      applyEntry && applyEntry();
       this._update(path, pendingLocation);
     });
   }

modules/MemoryHistory.js

@@ -96,12 +96,10 @@ class MemoryHistory extends History {
       this.constructor.name, n
     );
 
-    var next = this.current + n;
-    var nextEntry = this.entries[next];
+    this.current += n;
+    var entry = this.entries[this.current];
 
-    this.handlePop(nextEntry.path, { key: nextEntry.key, current: this.current }, () => {
-      this.current = next;
-    });
+    this.handlePop(entry.path, { key: entry.key, current: this.current });
   }
 
   canGo(n) {