Split OfflinePageSuggestions into two categories

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 "base/feature_list.h"
 #include "base/files/file_path.h"
 #include "base/memory/ptr_util.h"
 #include "base/memory/singleton.h"
@@ skipping 108 matching lines @@
   ContentSuggestionsService* service = new ContentSuggestionsService(state);
   if (state == State::DISABLED) {
     // Since we won't initialise the services, they won't get a chance to
     // unschedule their tasks. We do it explicitly here instead.
     ClearScheduledTasks();
     return service;
   }
 
 #if defined(OS_ANDROID)
   // Create the OfflinePageSuggestionsProvider.
-  if (base::FeatureList::IsEnabled(
-      ntp_snippets::kOfflinePageSuggestionsFeature)) {
+  bool recent_tabs_enabled = base::FeatureList::IsEnabled(
+      ntp_snippets::kRecentOfflineTabSuggestionsFeature);
+  bool downloads_enabled =
+      base::FeatureList::IsEnabled(ntp_snippets::kDownloadSuggestionsFeature);
+  if (recent_tabs_enabled || downloads_enabled) {
     OfflinePageModel* offline_page_model =
         OfflinePageModelFactory::GetForBrowserContext(profile);
 
     std::unique_ptr<OfflinePageSuggestionsProvider>
         offline_page_suggestions_provider =
             base::MakeUnique<OfflinePageSuggestionsProvider>(
-                service, service->category_factory(), offline_page_model,
+                recent_tabs_enabled, downloads_enabled, service,
+                service->category_factory(), offline_page_model,
                 profile->GetPrefs());
     service->RegisterProvider(std::move(offline_page_suggestions_provider));
   }
 #endif  // OS_ANDROID
 
   // Create the BookmarkSuggestionsProvider.
   if (base::FeatureList::IsEnabled(
           ntp_snippets::kBookmarkSuggestionsFeature)) {
     BookmarkModel* bookmark_model =
         BookmarkModelFactory::GetForBrowserContext(profile);
@@ skipping 41 matching lines @@
             base::MakeUnique<ImageDecoderImpl>(),
             base::MakeUnique<NTPSnippetsDatabase>(database_dir, task_runner),
             base::MakeUnique<NTPSnippetsStatusService>(signin_manager,
                                                        profile->GetPrefs()));
     service->set_ntp_snippets_service(ntp_snippets_service.get());
     service->RegisterProvider(std::move(ntp_snippets_service));
   }
 
   return service;
 }