Revert of Bring up of the enhanced bookmarks cluster service.

chrome/browser/enhanced_bookmarks/chrome_bookmark_server_cluster_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 CHROME_BROWSER_ENHANCED_BOOKMARKS_CHROME_BOOKMARK_SERVER_CLUSTER_SERVICE_H_
-#define CHROME_BROWSER_ENHANCED_BOOKMARKS_CHROME_BOOKMARK_SERVER_CLUSTER_SERVICE_H_
-
-#include "chrome/browser/sync/profile_sync_service_observer.h"
-#include "components/enhanced_bookmarks/bookmark_server_cluster_service.h"
-
-class ProfileSyncService;
-
-namespace enhanced_bookmarks {
-
-// A cluster service that invalidates its data when a sync operation finishes.
-class ChromeBookmarkServerClusterService : public BookmarkServerClusterService,
-                                           public ProfileSyncServiceObserver {
- public:
-  ChromeBookmarkServerClusterService(
-      const std::string& application_language_code,
-      scoped_refptr<net::URLRequestContextGetter> request_context_getter,
-      ProfileOAuth2TokenService* token_service,
-      SigninManagerBase* signin_manager,
-      EnhancedBookmarkModel* enhanced_bookmark_model,
-      PrefService* pref_service,
-      ProfileSyncService* sync_service);
-  virtual ~ChromeBookmarkServerClusterService();
-
-  // ProfileSyncServiceObserver implementation.
-  virtual void OnStateChanged() override;
-  virtual void OnSyncCycleCompleted() override;
-
- private:
-  // This class observes the sync service for changes.
-  ProfileSyncService* sync_service_;
-
-  DISALLOW_COPY_AND_ASSIGN(ChromeBookmarkServerClusterService);
-};
-
-}  // namespace enhanced_bookmarks
-
-#endif  // CHROME_BROWSER_ENHANCED_BOOKMARKS_CHROME_BOOKMARK_SERVER_CLUSTER_SERVICE_H_