Allow dumping raw json fetched from the server.

components/ntp_snippets/ntp_snippets_service.h

 // Copyright 2015 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_SERVICE_H_
 #define COMPONENTS_NTP_SNIPPETS_NTP_SNIPPETS_SERVICE_H_
 
 #include <stddef.h>
 
 #include <memory>
@@ skipping 67 matching lines @@
   void FetchSnippets();
   // Fetches snippets from the server for specified hosts (overriding
   // suggestions from the suggestion service) and adds them to the current ones.
   void FetchSnippetsFromHosts(const std::set<std::string>& hosts);
 
   // Returns the last status message from the snippets fetcher.
   const std::string& last_status() const {
     return last_fetch_status_;
   }
 
+  // Returns the last json from the snippets fetcher.
+  const std::string& last_json() const {
+    return last_fetch_json_;
+  }
+
   // (Re)schedules the periodic fetching of snippets. This is necessary because
   // the schedule depends on the time of day
   void RescheduleFetching();
 
   // Deletes all currently stored snippets.
   void ClearSnippets();
 
   // Discards the snippet with the given |url|, if it exists. Returns true iff
   // a snippet was discarded.
   bool DiscardSnippet(const GURL& url);
@@ skipping 97 matching lines @@
   // The snippets fetcher.
   std::unique_ptr<NTPSnippetsFetcher> snippets_fetcher_;
 
   // The subscription to the snippets fetcher.
   std::unique_ptr<
       NTPSnippetsFetcher::SnippetsAvailableCallbackList::Subscription>
       snippets_fetcher_subscription_;
 
   std::string last_fetch_status_;
 
+  std::string last_fetch_json_;
+
   // Timer that calls us back when the next snippet expires.
   base::OneShotTimer expiry_timer_;
 
   ParseJSONCallback parse_json_callback_;
 
   base::WeakPtrFactory<NTPSnippetsService> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(NTPSnippetsService);
 };
 
 class NTPSnippetsServiceObserver {
  public:
   // Sent every time the service loads a new set of data.
   virtual void NTPSnippetsServiceLoaded() = 0;
   // Sent when the service is shutting down.
   virtual void NTPSnippetsServiceShutdown() = 0;
 
  protected:
   virtual ~NTPSnippetsServiceObserver() {}
 };
 
 }  // namespace ntp_snippets
 
 #endif  // COMPONENTS_NTP_SNIPPETS_NTP_SNIPPETS_SERVICE_H_