Move bookmark_model_observer.h to the bookmarks component

components/bookmarks/core/browser/base_bookmark_model_observer.cc

 // Copyright (c) 2011 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.
 
-#include "chrome/browser/bookmarks/base_bookmark_model_observer.h"
+#include "components/bookmarks/core/browser/base_bookmark_model_observer.h"
 
 void BaseBookmarkModelObserver::BookmarkModelLoaded(BookmarkModel* model,
                                                     bool ids_reassigned) {}
 
 void BaseBookmarkModelObserver::BookmarkModelBeingDeleted(
     BookmarkModel* model) {
   BookmarkModelChanged();
 }
 
 void BaseBookmarkModelObserver::BookmarkNodeMoved(
@@ skipping 30 matching lines @@
 void BaseBookmarkModelObserver::BookmarkNodeFaviconChanged(
     BookmarkModel* model,
     const BookmarkNode* node) {
 }
 
 void BaseBookmarkModelObserver::BookmarkNodeChildrenReordered(
     BookmarkModel* model,
     const BookmarkNode* node) {
   BookmarkModelChanged();
 }