Revert "Fix a ton of compiler warnings."

app/tree_model.h

-// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Copyright (c) 2008 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 APP_TREE_MODEL_H_
 #define APP_TREE_MODEL_H_
 
 #include <string>
 #include <vector>
 
 #include "base/logging.h"
 
 class SkBitmap;
 
 class TreeModel;
 
 // TreeModelNode --------------------------------------------------------------
 
 // Type of class returned from the model.
 class TreeModelNode {
  public:
   // Returns the title for the node.
   virtual const std::wstring& GetTitle() const = 0;
-
- protected:
-  ~TreeModelNode() {}
 };
 
 // Observer for the TreeModel. Notified of significant events to the model.
 class TreeModelObserver {
  public:
   // Notification that nodes were added to the specified parent.
   virtual void TreeNodesAdded(TreeModel* model,
                               TreeModelNode* parent,
                               int start,
                               int count) = 0;
 
   // Notification that nodes were removed from the specified parent.
   virtual void TreeNodesRemoved(TreeModel* model,
                                 TreeModelNode* parent,
                                 int start,
                                 int count) = 0;
 
   // Notification the children of |parent| have been reordered. Note, only
   // the direct children of |parent| have been reordered, not descendants.
   virtual void TreeNodeChildrenReordered(TreeModel* model,
                                          TreeModelNode* parent) = 0;
 
   // Notification that the contents of a node has changed.
   virtual void TreeNodeChanged(TreeModel* model, TreeModelNode* node) = 0;
-
- protected:
-  ~TreeModelObserver() {}
 };
 
 // TreeModel ------------------------------------------------------------------
 
 // The model for TreeView.
 class TreeModel {
  public:
   // Returns the root of the tree. This may or may not be shown in the tree,
   // see SetRootShown for details.
   virtual TreeModelNode* GetRoot() = 0;
@@ skipping 18 matching lines @@
   }
 
   // Returns the set of icons for the nodes in the tree. You only need override
   // this if you don't want to use the default folder icons.
   virtual void GetIcons(std::vector<SkBitmap>* icons) {}
 
   // Returns the index of the icon to use for |node|. Return -1 to use the
   // default icon. The index is relative to the list of icons returned from
   // GetIcons.
   virtual int GetIconIndex(TreeModelNode* node) { return -1; }
-
- protected:
-  ~TreeModel() {}
 };
 
 #endif  // APP_TREE_TREE_MODEL_H_