[NTP Client] Put dismissing sections behind a flag

components/ntp_snippets/features.h

Index: components/ntp_snippets/features.h
diff --git a/components/ntp_snippets/features.h b/components/ntp_snippets/features.h
index a3b16089253a358c2e930900460b02391e441309..1449d784d51d3730973fdbb1586c9fde8ad07676 100644
--- a/components/ntp_snippets/features.h
+++ b/components/ntp_snippets/features.h
@@ -17,12 +17,15 @@ extern const base::Feature kBookmarkSuggestionsFeature;
 extern const base::Feature kRecentOfflineTabSuggestionsFeature;
 extern const base::Feature kDownloadSuggestionsFeature;
 extern const base::Feature kPhysicalWebPageSuggestionsFeature;
-extern const base::Feature kForeignSessionsSuggestionsFeature;
+extern const base::Feature kForeignSessionsSuggestionsFeature;;
 
 // Feature to allow the 'save to offline' option to appear in the snippets
 // context menu.
 extern const base::Feature kSaveToOfflineFeature;
 
+// Feature to allow dismissing sections.
+extern const base::Feature kSectionDismissalFeature;
+
 // Global toggle for the whole content suggestions feature. If this is set to
 // false, all the per-provider features are ignored.
 extern const base::Feature kContentSuggestionsFeature;