[Android] Add an about flag for Download Manager UI

chrome/browser/android/chrome_feature_list.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 "chrome/browser/android/chrome_feature_list.h"
 
 #include <stddef.h>
 
 #include <string>
 
@@ skipping 17 matching lines @@
 
 // Array of features exposed through the Java ChromeFeatureList API. Entries in
 // this array may either refer to features defined in the header of this file or
 // in other locations in the code base (e.g. chrome/, components/, etc).
 const base::Feature* kFeaturesExposedToJava[] = {
     &features::kAutoplayMutedVideos,
     &features::kCredentialManagementAPI,
     &features::kSimplifiedFullscreenUI,
     &features::kWebPayments,
     &kAllBookmarksFeature,
+    &kDownloadsUiFeature,
     &kAndroidPayIntegrationV1,
     &kImportantSitesInCBD,
     &ntp_snippets::kContentSuggestionsFeature,
     &kNTPFakeOmniboxTextFeature,
     &kNTPMaterialDesign,
     &kNTPOfflinePagesFeature,
     &kNTPToolbarFeature,
     &kPhysicalWebFeature,
     &kPhysicalWebIgnoreOtherClientsFeature,
     &kReadItLaterInMenu,
     &kSystemDownloadManager,
     &kTabReparenting,
     &offline_pages::kOfflinePagesBackgroundLoadingFeature,
     &offline_pages::kOfflinePagesCTFeature,  // See crbug.com/620421.
     &offline_pages::kOfflinePagesSharingFeature,
     &password_manager::features::kViewPasswords,
 };
 
 }  // namespace
 
 const base::Feature kAllBookmarksFeature{"AllBookmarks",
                                          base::FEATURE_ENABLED_BY_DEFAULT};
 
+const base::Feature kDownloadsUiFeature{"DownloadsUi",
+                                         base::FEATURE_ENABLED_BY_DEFAULT};
+
 const base::Feature kImportantSitesInCBD{"ImportantSitesInCBD",
                                          base::FEATURE_DISABLED_BY_DEFAULT};
 
 const base::Feature kNTPMaterialDesign{"NTPMaterialDesign",
                                        base::FEATURE_ENABLED_BY_DEFAULT};
 
 const base::Feature kNTPOfflinePagesFeature{"NTPOfflinePages",
                                             base::FEATURE_DISABLED_BY_DEFAULT};
 
 const base::Feature kNTPToolbarFeature{"NTPToolbar",
@@ skipping 33 matching lines @@
   NOTREACHED();
   return false;
 }
 
 bool RegisterChromeFeatureListJni(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 }  // namespace android
 }  // namespace chrome