Reduce frequency of requesting bookmark clusters.

components/enhanced_bookmarks/enhanced_bookmark_model.h

 // Copyright 2014 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 COMPONENTS_ENHANCED_BOOKMARKS_ENHANCED_BOOKMARK_MODEL_H_
 #define COMPONENTS_ENHANCED_BOOKMARKS_ENHANCED_BOOKMARK_MODEL_H_
 
 #include <map>
 #include <string>
 
@@ skipping 131 matching lines @@
   void BookmarkModelChanged() override;
   void BookmarkModelLoaded(BookmarkModel* model, bool ids_reassigned) override;
   void BookmarkNodeAdded(BookmarkModel* model,
                          const BookmarkNode* parent,
                          int index) override;
   void BookmarkNodeRemoved(BookmarkModel* model,
                            const BookmarkNode* parent,
                            int old_index,
                            const BookmarkNode* node,
                            const std::set<GURL>& removed_urls) override;
+  void BookmarkNodeChanged(BookmarkModel* model,
+                           const BookmarkNode* node) override;
   void OnWillChangeBookmarkMetaInfo(BookmarkModel* model,
                                     const BookmarkNode* node) override;
   void BookmarkMetaInfoChanged(BookmarkModel* model,
                                const BookmarkNode* node) override;
   void BookmarkAllUserNodesRemoved(BookmarkModel* model,
                                    const std::set<GURL>& removed_urls) override;
 
   // Initialize the mapping from remote ids to nodes.
   void InitializeIdMap();
 
@@ skipping 41 matching lines @@
 
   std::string version_;
   std::string version_suffix_;
 
   base::WeakPtrFactory<EnhancedBookmarkModel> weak_ptr_factory_;
 };
 
 }  // namespace enhanced_bookmarks
 
 #endif  // COMPONENTS_ENHANCED_BOOKMARKS_ENHANCED_BOOKMARK_MODEL_H_