ui: Do not expose the underline type (vector) used in ListModel.

ui/base/models/list_model.h

-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// 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 "base/memory/scoped_vector.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:
-  typedef std::vector<ItemType*> Items;
-
   ListModel() {}
   virtual ~ListModel() {}
 
   // Adds |item| to the model at given |index|.
   virtual void AddAt(int index, ItemType* item) {
     DCHECK(index >= 0 && index <= item_count());
     items_->insert(items_.begin() + index, item);
     NotifyItemsAdded(index, 1);
   }
 
@@ skipping 51 matching lines @@
                       ListItemsRemoved(start, count));
   }
 
   void NotifyItemsChanged(int start, int count) {
     FOR_EACH_OBSERVER(ListModelObserver,
                       observers_,
                       ListItemsChanged(start, count));
   }
 
   int item_count() const { return static_cast<int>(items_.size()); }
-  const Items& items() const { return items_.get(); }
 
-  const ItemType* item_at(int index) const {
+  const ItemType* GetItemAt(int index) const {
     DCHECK(index >= 0 && index < item_count());
     return items_[index];
   }
-  ItemType* item_at(int index) {
+  ItemType* GetItemAt(int index) {
     return const_cast<ItemType*>(
-        const_cast<const ListModel<ItemType>*>(this)->item_at(index));
+        const_cast<const ListModel<ItemType>*>(this)->GetItemAt(index));
   }
 
  private:
   ScopedVector<ItemType> items_;
   ObserverList<ListModelObserver> observers_;
 
   DISALLOW_COPY_AND_ASSIGN(ListModel<ItemType>);
 };
 
 }  // namespace ui
 
 #endif  // UI_BASE_MODELS_LIST_MODEL_H_