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diff --git a/chrome/browser/bookmarks/bookmark_model_observer.h b/chrome/browser/bookmarks/bookmark_model_observer.h
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+++ b/chrome/browser/bookmarks/bookmark_model_observer.h
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+// 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) {}
+
+  // 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,
+                                 const BookmarkNode* parent,
+                                 int index) = 0;
+
+  // Invoked when a node has been removed, the item may still be starred though.
+  // |parent| the parent of the node that was removed.
+  // |old_index| the index of the removed node in |parent| before it was
+  // removed.
+  // |node| is the node that was removed.
+  virtual void BookmarkNodeRemoved(BookmarkModel* model,
+                                   const BookmarkNode* parent,
+                                   int old_index,
+                                   const BookmarkNode* node) = 0;
+
+  // Invoked when the title, url or favicon of a node has changed.
+  virtual void BookmarkNodeChanged(BookmarkModel* model,
+                                   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;
+
+  // Invoked before a batch import begins.  This tells UI intensive observers
+  // to wait until the updates finish to update themselves.
+  // These methods should only be used for imports. Observers should still
+  // respond to BookmarkNodeRemoved immediately, to avoid holding onto
+  // stale node pointers.
+  virtual void BookmarkImportBeginning(BookmarkModel* model) {}
+
+  // Invoked after a batch import finishes.  This tells observers to update
+  // themselves if they were waiting for the update to finish.
+  virtual void BookmarkImportEnding(BookmarkModel* model) {}
+
+ protected:
+  virtual ~BookmarkModelObserver() {}
+};
+
+#endif  // CHROME_BROWSER_BOOKMARKS_BOOKMARK_MODEL_OBSERVER_H_