Remove the bookmark provider from ContentSuggestions

ios/chrome/browser/ntp_snippets/ios_chrome_content_suggestions_service_factory.cc

 // Copyright 2015 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 "ios/chrome/browser/ntp_snippets/ios_chrome_content_suggestions_service_factory.h"
 
 #include "base/feature_list.h"
 #include "base/files/file_path.h"
 #include "base/json/json_reader.h"
 #include "base/memory/ptr_util.h"
@@ skipping 136 matching lines @@
           chrome_browser_state);
   std::unique_ptr<ntp_snippets::CategoryRanker> category_ranker =
       ntp_snippets::BuildSelectedCategoryRanker(
           prefs, base::MakeUnique<base::DefaultClock>());
   std::unique_ptr<ContentSuggestionsService> service =
       base::MakeUnique<ContentSuggestionsService>(
           State::ENABLED, signin_manager, history_service, large_icon_service,
           prefs, std::move(category_ranker), std::move(user_classifier),
           std::move(scheduler));
 
-  // Create the BookmarkSuggestionsProvider.
-  if (base::FeatureList::IsEnabled(ntp_snippets::kBookmarkSuggestionsFeature)) {
-    BookmarkModel* bookmark_model =
-        BookmarkModelFactory::GetForBrowserState(chrome_browser_state);
-    std::unique_ptr<BookmarkSuggestionsProvider> bookmark_suggestions_provider =
-        base::MakeUnique<BookmarkSuggestionsProvider>(service.get(),
-                                                      bookmark_model, prefs);
-    service->RegisterProvider(std::move(bookmark_suggestions_provider));
-  }
-
   // Create the ReadingListSuggestionsProvider.
   ReadingListModel* reading_list_model =
       ReadingListModelFactory::GetForBrowserState(chrome_browser_state);
   std::unique_ptr<ntp_snippets::ReadingListSuggestionsProvider>
       reading_list_suggestions_provider =
           base::MakeUnique<ntp_snippets::ReadingListSuggestionsProvider>(
               service.get(), reading_list_model);
   service->RegisterProvider(std::move(reading_list_suggestions_provider));
 
   if (base::FeatureList::IsEnabled(ntp_snippets::kArticleSuggestionsFeature)) {
@@ skipping 35 matching lines @@
                                                          prefs));
 
     service->remote_suggestions_scheduler()->SetProvider(provider.get());
     service->set_remote_suggestions_provider(provider.get());
     service->RegisterProvider(std::move(provider));
   }
 
   // TODO(crbug.com/703565): remove std::move() once Xcode 9.0+ is required.
   return std::move(service);
 }