[NTP::Push] Add feature

chrome/browser/flag_descriptions.h

 // Copyright 2017 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_FLAG_DESCRIPTIONS_H_
 #define CHROME_BROWSER_FLAG_DESCRIPTIONS_H_
 
 // Includes needed for macros allowing conditional compilation of some strings.
 #include "build/build_config.h"
 #include "build/buildflag.h"
@@ skipping 897 matching lines @@
 
 extern const char kEnableNtpMostLikelyFaviconsFromServerName[];
 extern const char kEnableNtpMostLikelyFaviconsFromServerDescription[];
 
 extern const char kEnableNtpOfflinePageDownloadSuggestionsName[];
 extern const char kEnableNtpOfflinePageDownloadSuggestionsDescription[];
 
 extern const char kEnableNtpPhysicalWebPageSuggestionsName[];
 extern const char kEnableNtpPhysicalWebPageSuggestionsDescription[];
 
+extern const char kEnableNtpPushUpdatesName[];
+extern const char kEnableNtpPushUpdatesDescription[];
+
 extern const char kEnableNtpRecentOfflineTabSuggestionsName[];
 extern const char kEnableNtpRecentOfflineTabSuggestionsDescription[];
 
 extern const char kEnableNtpRemoteSuggestionsName[];
 extern const char kEnableNtpRemoteSuggestionsDescription[];
 
 extern const char kEnableNtpSnippetsVisibilityName[];
 extern const char kEnableNtpSnippetsVisibilityDescription[];
 
 extern const char kEnableNtpSuggestionsNotificationsName[];
@@ skipping 544 matching lines @@
 #endif  // defined(TOOLKIT_VIEWS) || defined(OS_ANDROID)
 
 // ============================================================================
 // Don't just add flags to the end, put them in the right section in
 // alphabetical order. See top instructions for more.
 // ============================================================================
 
 }  // namespace flag_descriptions
 
 #endif  // CHROME_BROWSER_FLAG_DESCRIPTIONS_H_