[Bookmark suggestions] Remove an obsolete pref entry

chrome/browser/ntp_snippets/content_suggestions_service_factory.cc

 // Copyright 2016 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/ntp_snippets/content_suggestions_service_factory.h"
 
 #include <utility>
 
 #include "base/feature_list.h"
 #include "base/files/file_path.h"
@@ skipping 147 matching lines @@
                                PrefService* pref_service) {
   auto provider = base::MakeUnique<DownloadSuggestionsProvider>(
       service, offline_page_model, download_manager, download_history,
       pref_service, base::MakeUnique<base::DefaultClock>());
   service->RegisterProvider(std::move(provider));
 }
 
 #endif  // OS_ANDROID
 
 void RegisterBookmarkProvider(BookmarkModel* bookmark_model,
-                              ContentSuggestionsService* service,
-                              PrefService* pref_service) {
-  auto provider = base::MakeUnique<BookmarkSuggestionsProvider>(
-      service, bookmark_model, pref_service);
+                              ContentSuggestionsService* service) {
+  auto provider =
+      base::MakeUnique<BookmarkSuggestionsProvider>(service, bookmark_model);
   service->RegisterProvider(std::move(provider));
 }
 
 #if defined(OS_ANDROID)
 
 bool IsPhysicalWebPageProviderEnabled() {
   return base::FeatureList::IsEnabled(
              ntp_snippets::kPhysicalWebPageSuggestionsFeature) &&
          base::FeatureList::IsEnabled(chrome::android::kPhysicalWebFeature);
 }
@@ skipping 183 matching lines @@
 
   offline_pages::SuggestedArticlesObserver::ObserveContentSuggestionsService(
       profile, service);
 #endif  // OS_ANDROID
 
   // |bookmark_model| can be null in tests.
   BookmarkModel* bookmark_model =
       BookmarkModelFactory::GetForBrowserContext(profile);
   if (base::FeatureList::IsEnabled(ntp_snippets::kBookmarkSuggestionsFeature) &&
       bookmark_model && !IsChromeHomeEnabled()) {
-    RegisterBookmarkProvider(bookmark_model, service, pref_service);
+    RegisterBookmarkProvider(bookmark_model, service);
   }
 
 #if defined(OS_ANDROID)
   if (IsPhysicalWebPageProviderEnabled()) {
     PhysicalWebDataSource* physical_web_data_source =
         g_browser_process->GetPhysicalWebDataSource();
     RegisterPhysicalWebPageProvider(service, physical_web_data_source,
                                     pref_service);
   }
 #endif  // OS_ANDROID
@@ skipping 14 matching lines @@
         ProfileSyncServiceFactory::GetSyncServiceForBrowserContext(profile);
     RegisterForeignSessionsProvider(sync_service, service, pref_service);
   }
 
   return service;
 
 #else
   return nullptr;
 #endif  // CONTENT_SUGGESTIONS_ENABLED
 }