[NTP Snippets] Another round of clang-tidy cleanups

components/ntp_snippets/remote/ntp_snippets_fetcher.h

Index: components/ntp_snippets/remote/ntp_snippets_fetcher.h
diff --git a/components/ntp_snippets/remote/ntp_snippets_fetcher.h b/components/ntp_snippets/remote/ntp_snippets_fetcher.h
index f5bbf27412cc229053c8a01e15988a324e07afc0..9e4df872d9d9cb1fc9b3a68f6c53a63aeab02699 100644
--- a/components/ntp_snippets/remote/ntp_snippets_fetcher.h
+++ b/components/ntp_snippets/remote/ntp_snippets_fetcher.h
@@ -169,14 +169,14 @@ class NTPSnippetsFetcher : public OAuth2TokenService::Consumer,
   };
 
   struct RequestParams {
-    FetchAPI fetch_api;
+    FetchAPI fetch_api = CHROME_READER_API;
     std::string obfuscated_gaia_id;
-    bool only_return_personalized_results;
+    bool only_return_personalized_results = false;
     std::string user_locale;
     std::set<std::string> host_restricts;
     std::set<std::string> excluded_ids;
-    int count_to_fetch;
-    bool interactive_request;
+    int count_to_fetch = 0;
+    bool interactive_request = false;
     std::string user_class;
     translate::LanguageModel::LanguageInfo ui_language;
     translate::LanguageModel::LanguageInfo other_top_language;