Revert of Bring up of the enhanced bookmarks cluster service.

chrome/browser/enhanced_bookmarks/chrome_bookmark_server_cluster_service.cc

-// 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.
-
-#include "chrome/browser/enhanced_bookmarks/chrome_bookmark_server_cluster_service.h"
-
-#include "chrome/browser/sync/profile_sync_service.h"
-#include "components/enhanced_bookmarks/enhanced_bookmark_model.h"
-
-namespace enhanced_bookmarks {
-
-ChromeBookmarkServerClusterService::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)
-    : BookmarkServerClusterService(application_language_code,
-                                   request_context_getter,
-                                   token_service,
-                                   signin_manager,
-                                   enhanced_bookmark_model,
-                                   pref_service),
-      sync_service_(sync_service) {
-  if (sync_service_)
-    sync_service_->AddObserver(this);
-}
-
-ChromeBookmarkServerClusterService::~ChromeBookmarkServerClusterService() {
-  if (sync_service_)
-    sync_service_->RemoveObserver(this);
-}
-
-void ChromeBookmarkServerClusterService::OnStateChanged() {
-  // Do nothing.
-}
-
-void ChromeBookmarkServerClusterService::OnSyncCycleCompleted() {
-  // The stars cluster API relies on the information in chrome-sync. Sending a
-  // cluster request immediately after a bookmark is changed from the bookmark
-  // observer notification will yield the wrong results. The request must be
-  // delayed until the sync cycle has completed.
-  // TODO(noyau): This might happen too often, need a way to coalesce and delay
-  // the notifications.
-  if (model_->loaded())
-    TriggerTokenRequest(false);
-}
-
-}  // namespace enhanced_bookmarks