Allows to dump current snippets to a json in the Downloads folder.

components/ntp_snippets/ntp_snippets_service.h

Index: components/ntp_snippets/ntp_snippets_service.h
diff --git a/components/ntp_snippets/ntp_snippets_service.h b/components/ntp_snippets/ntp_snippets_service.h
index c7a32443301e976c088ec1dc7dbb7945e3267879..cbe281e2479b6d351792ebb5b05a62746dc78261 100644
--- a/components/ntp_snippets/ntp_snippets_service.h
+++ b/components/ntp_snippets/ntp_snippets_service.h
@@ -90,7 +90,7 @@ class NTPSnippetsService : public KeyedService {
   // a snippet was discarded.
   bool DiscardSnippet(const GURL& url);
 
-  // Returns the lists of snippets previously discarded by the user (that are
+  // Returns the list of snippets previously discarded by the user (that are
   // not expired yet).
   const NTPSnippetStorage& discarded_snippets() const {
     return discarded_snippets_;