Enable download home by default

chrome/browser/ntp_snippets/download_suggestions_provider.h

 // 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.
 
 #ifndef CHROME_BROWSER_NTP_SNIPPETS_DOWNLOAD_SUGGESTIONS_PROVIDER_H_
 #define CHROME_BROWSER_NTP_SNIPPETS_DOWNLOAD_SUGGESTIONS_PROVIDER_H_
 
 #include <set>
 #include <string>
 #include <vector>
@@ skipping 28 matching lines @@
       public offline_pages::OfflinePageModel::Observer,
       public content::DownloadManager::Observer,
       public content::DownloadItem::Observer,
       public DownloadHistory::Observer {
  public:
   DownloadSuggestionsProvider(
       ContentSuggestionsProvider::Observer* observer,
       offline_pages::OfflinePageModel* offline_page_model,
       content::DownloadManager* download_manager,
       DownloadHistory* download_history,
-      PrefService* pref_service,
-      bool download_manager_ui_enabled);
+      PrefService* pref_service);
   ~DownloadSuggestionsProvider() override;
 
   // ContentSuggestionsProvider implementation.
   ntp_snippets::CategoryStatus GetCategoryStatus(
       ntp_snippets::Category category) override;
   ntp_snippets::CategoryInfo GetCategoryInfo(
       ntp_snippets::Category category) override;
   void DismissSuggestion(
       const ntp_snippets::ContentSuggestion::ID& suggestion_id) override;
   void FetchSuggestionImage(
@@ skipping 154 matching lines @@
   // |kMaxSuggestionsCount| offline pages, then all of them which satisfy the
   // criteria above are cached, otherwise only |kMaxSuggestionsCount|.
   std::vector<offline_pages::OfflinePageItem> cached_offline_page_downloads_;
   // Cached asset downloads. If there are not enough offline page downloads, all
   // of these could be shown (they are the most recently downloaded, not
   // dismissed and not invalidated). Order is undefined. If the model has less
   // than |kMaxSuggestionsCount| asset downloads, then all of them which satisfy
   // the criteria above are cached, otherwise only |kMaxSuggestionsCount|.
   std::vector<const content::DownloadItem*> cached_asset_downloads_;
 
-  // Whether the Download Manager UI is enabled, in which case the More button
-  // for the Downloads section can redirect there.
-  const bool download_manager_ui_enabled_;
-
   bool is_asset_downloads_initialization_complete_;
 
   base::WeakPtrFactory<DownloadSuggestionsProvider> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DownloadSuggestionsProvider);
 };
 
 #endif  // CHROME_BROWSER_NTP_SNIPPETS_DOWNLOAD_SUGGESTIONS_PROVIDER_H_