Move bookmark_model_observer.h to the bookmarks component

chrome/browser/bookmarks/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"
-
-void BaseBookmarkModelObserver::BookmarkModelLoaded(BookmarkModel* model,
-                                                    bool ids_reassigned) {}
-
-void BaseBookmarkModelObserver::BookmarkModelBeingDeleted(
-    BookmarkModel* model) {
-  BookmarkModelChanged();
-}
-
-void BaseBookmarkModelObserver::BookmarkNodeMoved(
-    BookmarkModel* model,
-    const BookmarkNode* old_parent,
-    int old_index,
-    const BookmarkNode* new_parent,
-    int new_index) {
-  BookmarkModelChanged();
-}
-
-void BaseBookmarkModelObserver::BookmarkNodeAdded(BookmarkModel* model,
-                                                  const BookmarkNode* parent,
-                                                  int index) {
-  BookmarkModelChanged();
-}
-
-void BaseBookmarkModelObserver::BookmarkNodeRemoved(BookmarkModel* model,
-                                                    const BookmarkNode* parent,
-                                                    int old_index,
-                                                    const BookmarkNode* node) {
-  BookmarkModelChanged();
-}
-
-void BaseBookmarkModelObserver::BookmarkAllNodesRemoved(BookmarkModel* model) {
-  BookmarkModelChanged();
-}
-
-void BaseBookmarkModelObserver::BookmarkNodeChanged(BookmarkModel* model,
-                                                    const BookmarkNode* node) {
-  BookmarkModelChanged();
-}
-
-void BaseBookmarkModelObserver::BookmarkNodeFaviconChanged(
-    BookmarkModel* model,
-    const BookmarkNode* node) {
-}
-
-void BaseBookmarkModelObserver::BookmarkNodeChildrenReordered(
-    BookmarkModel* model,
-    const BookmarkNode* node) {
-  BookmarkModelChanged();
-}