[NTP::Push] Add feature

chrome/browser/about_flags.cc

Index: chrome/browser/about_flags.cc
diff --git a/chrome/browser/about_flags.cc b/chrome/browser/about_flags.cc
index 6ebb3ea2912a6189672500d07426fa9894e0d524..9928f8db967b75f07521e5e2a3bd0030e235dde9 100644
--- a/chrome/browser/about_flags.cc
+++ b/chrome/browser/about_flags.cc
@@ -2397,6 +2397,9 @@ const FeatureEntry kFeatureEntries[] = {
     {"ntp-google-g-in-omnibox", flag_descriptions::kNtpGoogleGInOmniboxName,
      flag_descriptions::kNtpGoogleGInOmniboxDescription, kOsAndroid,
      FEATURE_VALUE_TYPE(chrome::android::NTPShowGoogleGInOmniboxFeature)},
+    {"enable-ntp-push-updates", flag_descriptions::kEnableNtpPushUpdatesName,
+     flag_descriptions::kEnableNtpPushUpdatesDescription, kOsAndroid,
+     FEATURE_VALUE_TYPE(ntp_snippets::kPushUpdatesFeature)},
 #endif  // OS_ANDROID
 #if BUILDFLAG(ENABLE_WEBRTC) && BUILDFLAG(RTC_USE_H264) && \
     !defined(MEDIA_DISABLE_FFMPEG)