Move bookmark_model_observer.h to the bookmarks component

components/bookmarks/core/browser/bookmark_model_observer.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 CHROME_BROWSER_BOOKMARKS_BOOKMARK_MODEL_OBSERVER_H_
-#define CHROME_BROWSER_BOOKMARKS_BOOKMARK_MODEL_OBSERVER_H_
+#ifndef COMPONENTS_BOOKMARKS_CORE_BROWSER_BOOKMARK_MODEL_OBSERVER_H_
+#define COMPONENTS_BOOKMARKS_CORE_BROWSER_BOOKMARK_MODEL_OBSERVER_H_
 
 class BookmarkModel;
 class BookmarkNode;
 
 // Observer for the BookmarkModel.
 class BookmarkModelObserver {
  public:
   // Invoked when the model has finished loading. |ids_reassigned| mirrors
   // that of BookmarkLoadDetails::ids_reassigned. See it for details.
   virtual void BookmarkModelLoaded(BookmarkModel* model,
@@ skipping 88 matching lines @@
   virtual void GroupedBookmarkChangesBeginning(BookmarkModel* model) {}
 
   // Invoked after a set of model changes triggered by a single user action has
   // ended.
   virtual void GroupedBookmarkChangesEnded(BookmarkModel* model) {}
 
  protected:
   virtual ~BookmarkModelObserver() {}
 };
 
-#endif  // CHROME_BROWSER_BOOKMARKS_BOOKMARK_MODEL_OBSERVER_H_
+#endif  // COMPONENTS_BOOKMARKS_CORE_BROWSER_BOOKMARK_MODEL_OBSERVER_H_