Skip enhanced bookmarks cluster requests if it's not being used.

components/enhanced_bookmarks/bookmark_server_service.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_BOOKMARK_SERVER_SERVICE_H_
 #define COMPONENTS_ENHANCED_BOOKMARKS_BOOKMARK_SERVER_SERVICE_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 29 matching lines @@
                               private OAuth2TokenService::Consumer,
                               public EnhancedBookmarkModelObserver {
  public:
   BookmarkServerService(
       scoped_refptr<net::URLRequestContextGetter> request_context_getter,
       ProfileOAuth2TokenService* token_service,
       SigninManagerBase* signin_manager,
       EnhancedBookmarkModel* enhanced_bookmark_model);
   virtual ~BookmarkServerService();
 
-  void AddObserver(BookmarkServerServiceObserver* observer);
+  virtual void AddObserver(BookmarkServerServiceObserver* observer);
   void RemoveObserver(BookmarkServerServiceObserver* observer);
 
  protected:
   // Retrieves a bookmark by using its remote id. Returns null if nothing
   // matches.
   virtual const BookmarkNode* BookmarkForRemoteId(
       const std::string& remote_id) const;
   const std::string RemoteIDForBookmark(const BookmarkNode* bookmark) const;
 
   // Notifies the observers that something changed.
@@ skipping 16 matching lines @@
   virtual void CleanAfterFailure() = 0;
 
   // EnhancedBookmarkModelObserver:
   virtual void EnhancedBookmarkModelShuttingDown() override;
 
   SigninManagerBase* GetSigninManager();
 
   // Cached pointer to the bookmarks model.
   EnhancedBookmarkModel* model_;  // weak
 
+ protected:
+  // The observers.
+  ObserverList<BookmarkServerServiceObserver> observers_;
+
  private:
   FRIEND_TEST_ALL_PREFIXES(BookmarkServerServiceTest, Cluster);
   FRIEND_TEST_ALL_PREFIXES(BookmarkServerServiceTest, SignOut);
   FRIEND_TEST_ALL_PREFIXES(BookmarkServerServiceTest,
                            ClearClusterMapOnRemoveAllBookmarks);
 
   // net::URLFetcherDelegate methods. Called when the query is finished.
   virtual void OnURLFetchComplete(const net::URLFetcher* source) override;
 
   // OAuth2TokenService::Consumer methods.
   virtual void OnGetTokenSuccess(const OAuth2TokenService::Request* request,
                                  const std::string& access_token,
                                  const base::Time& expiration_time) override;
   virtual void OnGetTokenFailure(const OAuth2TokenService::Request* request,
                                  const GoogleServiceAuthError& error) override;
 
-  // The observers.
-  ObserverList<BookmarkServerServiceObserver> observers_;
   // The Auth service is used to get a token for auth with the server.
   ProfileOAuth2TokenService* token_service_;  // Weak
   // The request to the token service.
   scoped_ptr<OAuth2TokenService::Request> token_request_;
   // To get the currently signed in user.
   SigninManagerBase* signin_manager_;  // Weak
   // To have access to the right context getter for the profile.
   scoped_refptr<net::URLRequestContextGetter> request_context_getter_;
   // The fetcher used to query the server.
   scoped_ptr<net::URLFetcher> url_fetcher_;
 
   DISALLOW_COPY_AND_ASSIGN(BookmarkServerService);
 };
 }  // namespace enhanced_bookmarks
 
 #endif  // COMPONENTS_ENHANCED_BOOKMARKS_BOOKMARK_SERVER_SERVICE_H_