[NTP Client] Put dismissing sections behind a flag

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 24 matching lines @@
     &features::kAutoplayMutedVideos,
     &features::kCredentialManagementAPI,
     &features::kSimplifiedFullscreenUI,
     &features::kWebPayments,
     &kAndroidPayIntegrationV1,
     &kChromeHomeFeature,
     &kDownloadsUiFeature,
     &kImportantSitesInCBD,
     &ntp_snippets::kContentSuggestionsFeature,
     &ntp_snippets::kSaveToOfflineFeature,
+    &ntp_snippets::kSectionDismissalFeature,
     &kNTPFakeOmniboxTextFeature,
     &kNTPOfflinePagesFeature,
     &kPhysicalWebFeature,
     &kPhysicalWebIgnoreOtherClientsFeature,
     &kScanCardsInWebPayments,
     &kSpecialLocaleFeature,
     &kSpecialLocaleWrapper,
     &kTabReparenting,
     &kCCTExternalLinkHandling,
     &offline_pages::kOfflinePagesBackgroundLoadingFeature,
@@ skipping 59 matching lines @@
   NOTREACHED();
   return false;
 }
 
 bool RegisterChromeFeatureListJni(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 }  // namespace android
 }  // namespace chrome