Add robustness against OAuth2 Token requests getting canceled.

components/ntp_snippets/ntp_snippets_fetcher.h

Index: components/ntp_snippets/ntp_snippets_fetcher.h
diff --git a/components/ntp_snippets/ntp_snippets_fetcher.h b/components/ntp_snippets/ntp_snippets_fetcher.h
index 11a4e40f568433f00c4529dd1e40d0dfb785f806..2f4d9bb1e5e53e62265dae36ea7a38f151cfd049 100644
--- a/components/ntp_snippets/ntp_snippets_fetcher.h
+++ b/components/ntp_snippets/ntp_snippets_fetcher.h
@@ -230,6 +230,9 @@ class NTPSnippetsFetcher : public OAuth2TokenService::Consumer,
   // Request throttler for limiting requests.
   RequestThrottler request_throttler_;
 
+  // When a token request gets canceled, we want to retry once.
+  bool oauth_token_retried_;
+
   base::WeakPtrFactory<NTPSnippetsFetcher> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(NTPSnippetsFetcher);