Revert "Fix a ton of compiler warnings."

chrome/browser/bookmarks/bookmark_model_observer.h

 // Copyright (c) 2009 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 CHROME_BROWSER_BOOKMARKS_BOOKMARK_MODEL_OBSERVER_H_
 #define CHROME_BROWSER_BOOKMARKS_BOOKMARK_MODEL_OBSERVER_H_
 
 class BookmarkModel;
 class BookmarkNode;
 
 // Observer for the BookmarkModel.
 class BookmarkModelObserver {
  public:
   // Invoked when the model has finished loading.
   virtual void Loaded(BookmarkModel* model) = 0;
 
   // Invoked from the destructor of the BookmarkModel.
-  virtual void BookmarkModelBeingDeleted(BookmarkModel* model) {}
+  virtual void BookmarkModelBeingDeleted(BookmarkModel* model) { }
 
   // Invoked when a node has moved.
   virtual void BookmarkNodeMoved(BookmarkModel* model,
                                  const BookmarkNode* old_parent,
                                  int old_index,
                                  const BookmarkNode* new_parent,
                                  int new_index) = 0;
 
   // Invoked when a node has been added.
   virtual void BookmarkNodeAdded(BookmarkModel* model,
@@ skipping 15 matching lines @@
                                    const BookmarkNode* node) = 0;
 
   // Invoked when a favicon has finished loading.
   virtual void BookmarkNodeFavIconLoaded(BookmarkModel* model,
                                          const BookmarkNode* node) = 0;
 
   // Invoked when the children (just direct children, not descendants) of
   // |node| have been reordered in some way, such as sorted.
   virtual void BookmarkNodeChildrenReordered(BookmarkModel* model,
                                              const BookmarkNode* node) = 0;
-
- protected:
-  ~BookmarkModelObserver() {}
 };
 
 #endif  // CHROME_BROWSER_BOOKMARKS_BOOKMARK_MODEL_OBSERVER_H_