Add robustness against OAuth2 Token requests getting canceled.

components/ntp_snippets/ntp_snippets_fetcher.h

 // Copyright 2016 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.
 
 #ifndef COMPONENTS_NTP_SNIPPETS_NTP_SNIPPETS_FETCHER_H_
 #define COMPONENTS_NTP_SNIPPETS_NTP_SNIPPETS_FETCHER_H_
 
 #include <memory>
 #include <set>
 #include <string>
@@ skipping 212 matching lines @@
   Personalization personalization_;
   // Should we apply host restriction? It is loaded from variation parameters.
   bool use_host_restriction_;
 
   // Allow for an injectable tick clock for testing.
   std::unique_ptr<base::TickClock> tick_clock_;
 
   // Request throttler for limiting requests.
   RequestThrottler request_throttler_;
 
+  // When a token request gets canceled, we want to retry for _one_ time.

[Marc Treib, 2016/08/11 10:11:03]

nit: s/for one time/once/

[jkrcal, 2016/08/11 12:31:48]

Done.

+  bool oauth_token_retried_;
+
   base::WeakPtrFactory<NTPSnippetsFetcher> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(NTPSnippetsFetcher);
 };
 }  // namespace ntp_snippets
 
 #endif  // COMPONENTS_NTP_SNIPPETS_NTP_SNIPPETS_FETCHER_H_