NTP Snippets: Added error codes for out of quota events

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 38 matching lines @@
 
   using OptionalSnippets = base::Optional<NTPSnippet::CategoryMap>;
   // |snippets| contains parsed snippets if a fetch succeeded. If problems
   // occur, |snippets| contains no value (no actual vector in base::Optional).
   // Error details can be retrieved using last_status().
   using SnippetsAvailableCallback =
       base::Callback<void(OptionalSnippets snippets)>;
 
   // Enumeration listing all possible outcomes for fetch attempts. Used for UMA
   // histograms, so do not change existing values. Insert new values at the end,
   // and update the histogram definition.

[Marc Treib, 2016/08/25 11:58:27]

^^ You'll have to update histograms.xml too

   enum class FetchResult {
     SUCCESS,
     EMPTY_HOSTS,
     URL_REQUEST_STATUS_ERROR,
     HTTP_ERROR,
     JSON_PARSE_ERROR,
     INVALID_SNIPPET_CONTENT_ERROR,
     OAUTH_TOKEN_ERROR,
+    INTERACTIVE_QUOTA_ERROR,
+    NON_INTERACTIVE_QUOTA_ERROR,
     RESULT_MAX
   };
 
   // Enumeration listing all possible variants of dealing with personalization.
   enum class Personalization {
     kPersonal,
     kNonPersonal,
     kBoth
   };
 
@@ skipping 157 matching lines @@
   // 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);
 };
 }  // namespace ntp_snippets
 
 #endif  // COMPONENTS_NTP_SNIPPETS_NTP_SNIPPETS_FETCHER_H_