ui/base/models: Remove unnecessary virtuals from ListModel functions.

ui/base/models/list_model.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef UI_BASE_MODELS_LIST_MODEL_H_
 #define UI_BASE_MODELS_LIST_MODEL_H_
 #pragma once
 
 #include "base/basictypes.h"
 #include "base/logging.h"
 #include "base/memory/scoped_vector.h"
 #include "base/observer_list.h"
 #include "ui/base/models/list_model_observer.h"
 
 namespace ui {
 
 // A list model that manages a list of ItemType pointers. Items added to the
 // model are owned by the model. An item can be taken out of the model by
 // RemoveAt.
 template <class ItemType>
 class ListModel {
  public:
   ListModel() {}
-  virtual ~ListModel() {}
+  ~ListModel() {}
 
   // Adds |item| to the model at given |index|.
-  virtual void AddAt(size_t index, ItemType* item) {
+  void AddAt(size_t index, ItemType* item) {
     DCHECK_LE(index, item_count());
     items_->insert(items_.begin() + index, item);
     NotifyItemsAdded(index, 1);
   }
 
+  // Convenience function to append an item to the model.
+  void Add(ItemType* item) {
+    AddAt(item_count(), item);
+  }
+
   // Removes an item at given |index| from the model. Note the removed item
   // is NOT deleted and it's up to the caller to delete it.
-  virtual ItemType* RemoveAt(size_t index) {
+  ItemType* RemoveAt(size_t index) {
     DCHECK_LT(index, item_count());
     ItemType* item = items_[index];
     items_->erase(items_.begin() + index);
     NotifyItemsRemoved(index, 1);
     return item;
   }
 
   // Removes all items from the model. This does NOT delete the items.
-  virtual void RemoveAll() {
+  void RemoveAll() {
     size_t count = item_count();
     items_->clear();
     NotifyItemsRemoved(0, count);
   }
 
   // Removes an item at given |index| from the model and deletes it.
-  virtual void DeleteAt(size_t index) {
+  void DeleteAt(size_t index) {
     delete RemoveAt(index);
   }
 
   // Removes and deletes all items from the model.
-  virtual void DeleteAll() {
+  void DeleteAll() {
     size_t count = item_count();
     items_.reset();
     NotifyItemsRemoved(0, count);
   }
 
-  // Convenience function to append an item to the model.
-  void Add(ItemType* item) {
-    AddAt(item_count(), item);
-  }
-
   void AddObserver(ListModelObserver* observer) {
     observers_.AddObserver(observer);
   }
 
   void RemoveObserver(ListModelObserver* observer) {
     observers_.RemoveObserver(observer);
   }
 
   void NotifyItemsAdded(size_t start, size_t count) {
     FOR_EACH_OBSERVER(ListModelObserver,
@@ skipping 27 matching lines @@
  private:
   ScopedVector<ItemType> items_;
   ObserverList<ListModelObserver> observers_;
 
   DISALLOW_COPY_AND_ASSIGN(ListModel<ItemType>);
 };
 
 }  // namespace ui
 
 #endif  // UI_BASE_MODELS_LIST_MODEL_H_