Upstream chrome://flags & chrome://ui-alternatives iOS WebUI.

components/flags_ui/flags_ui_constants.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 "components/flags_ui/flags_ui_constants.h"
 
 namespace flags_ui {
 
 // Resource paths.
 const char kFlagsJS[] = "flags.js";
 
 // Message handlers.
 const char kEnableExperimentalFeature[] = "enableExperimentalFeature";
 const char kRequestExperimentalFeatures[] = "requestExperimentalFeatures";
 const char kResetAllFlags[] = "resetAllFlags";
 const char kRestartBrowser[] = "restartBrowser";
 
 // Other values.
 const char kChannelPromoBeta[] = "channelPromoBeta";
 const char kChannelPromoDev[] = "channelPromoDev";
 const char kDisable[] = "disable";
 const char kEnable[] = "enable";
 const char kFlagsBlurb[] = "flagsBlurb";
 const char kFlagsLongTitle[] = "flagsLongTitle";
+const char kFlagsNoExperimentsAvailable[] = "flagsNoExperimentsAvailable";
 const char kFlagsNotSupported[] = "flagsNotSupported";
 const char kFlagsRestartButton[] = "flagsRestartButton";
 const char kFlagsRestartNotice[] = "flagsRestartNotice";
 const char kFlagsTableTitle[] = "flagsTableTitle";
 const char kFlagsUnsupportedTableTitle[] = "flagsUnsupportedTableTitle";
 const char kFlagsWarningHeader[] = "flagsWarningHeader";
 const char kNeedsRestart[] = "needsRestart";
 const char kOwnerWarning[] = "ownerWarning";
 const char kResetAllButton[] = "resetAllButton";
 const char kReturnExperimentalFeatures[] = "returnExperimentalFeatures";
 const char kShowBetaChannelPromotion[] = "showBetaChannelPromotion";
 const char kShowDevChannelPromotion[] = "showDevChannelPromotion";
 const char kShowOwnerWarning[] = "showOwnerWarning";
 const char kSupportedFeatures[] = "supportedFeatures";
 const char kUnsupportedFeatures[] = "unsupportedFeatures";
 
 }  // namespace flags_ui