[Custom Tabs] Implement "Read It Later" Behind a Flag

chrome/browser/about_flags.cc

 // Copyright (c) 2012 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/about_flags.h"
 
 #include <iterator>
 #include <map>
 #include <set>
 #include <utility>
@@ skipping 777 matching lines @@
      kOsWin | kOsLinux | kOsCrOS | kOsAndroid,
      SINGLE_DISABLE_VALUE_TYPE(switches::kDisableTouchAdjustment)},
 #if defined(OS_CHROMEOS)
     {"network-portal-notification", IDS_FLAGS_NETWORK_PORTAL_NOTIFICATION_NAME,
      IDS_FLAGS_NETWORK_PORTAL_NOTIFICATION_DESCRIPTION, kOsCrOS,
      ENABLE_DISABLE_VALUE_TYPE(
          chromeos::switches::kEnableNetworkPortalNotification,
          chromeos::switches::kDisableNetworkPortalNotification)},
 #endif
 #if defined(OS_ANDROID)
+    {"enable-read-it-later-in-menu",
+     IDS_FLAGS_ENABLE_READ_IT_LATER_IN_MENU_NAME,
+     IDS_FLAGS_ENABLE_READ_IT_LATER_IN_MENU_DESCRIPTION, kOsAndroid,
+     FEATURE_VALUE_TYPE(chrome::android::kReadItLaterInMenu)},
     {"enable-system-download-manager",
      IDS_FLAGS_ENABLE_SYSTEM_DOWNLOAD_MANAGER_NAME,
      IDS_FLAGS_ENABLE_SYSTEM_DOWNLOAD_MANAGER_DESCRIPTION, kOsAndroid,
      FEATURE_VALUE_TYPE(chrome::android::kSystemDownloadManager)},
     {"enable-media-document-download-button",
      IDS_FLAGS_MEDIA_DOCUMENT_DOWNLOAD_BUTTON_NAME,
      IDS_FLAGS_MEDIA_DOCUMENT_DOWNLOAD_BUTTON_DESCRIPTION, kOsAndroid,
      FEATURE_VALUE_TYPE(features::kMediaDocumentDownloadButton)},
 #endif
 #if defined(OS_CHROMEOS)
@@ skipping 1298 matching lines @@
 const base::HistogramBase::Sample kBadSwitchFormatHistogramId = 0;
 
 const FeatureEntry* GetFeatureEntries(size_t* count) {
   *count = arraysize(kFeatureEntries);
   return kFeatureEntries;
 }
 
 }  // namespace testing
 
 }  // namespace about_flags