Removes a data-dependent DCHECK().

components/ntp_snippets/remote/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_REMOTE_NTP_SNIPPETS_SERVICE_H_
 #define COMPONENTS_NTP_SNIPPETS_REMOTE_NTP_SNIPPETS_SERVICE_H_
 
 #include <cstddef>
 #include <map>
 #include <memory>
@@ skipping 188 matching lines @@
 
   // image_fetcher::ImageFetcherDelegate implementation.
   void OnImageDataFetched(const std::string& id_within_category,
                           const std::string& image_data) override;
 
   // Callbacks for the NTPSnippetsDatabase.
   void OnDatabaseLoaded(NTPSnippet::PtrVector snippets);
   void OnDatabaseError();
 
   // Callback for the NTPSnippetsFetcher.
-  void OnFetchFinished(NTPSnippetsFetcher::OptionalSnippets snippets);
+  void OnFetchFinished(
+      NTPSnippetsFetcher::OptionalFetchedCategories fetched_categories);
 
   // Moves all snippets from |to_archive| into the archive of the |category|.
   // It also deletes the snippets from the DB and keeps the archive reasonably
   // short.
   void ArchiveSnippets(Category category, NTPSnippet::PtrVector* to_archive);
 
   // Replace old snippets in |category| by newly available snippets.
   void ReplaceSnippets(Category category, NTPSnippet::PtrVector new_snippets);
 
   // Removes expired dismissed snippets from the service and the database.
@@ skipping 132 matching lines @@
 
   // Request throttler for limiting requests to thumbnail images.
   RequestThrottler thumbnail_requests_throttler_;
 
   DISALLOW_COPY_AND_ASSIGN(NTPSnippetsService);
 };
 
 }  // namespace ntp_snippets
 
 #endif  // COMPONENTS_NTP_SNIPPETS_REMOTE_NTP_SNIPPETS_SERVICE_H_