[NTP Snippets] Another round of clang-tidy cleanups

components/ntp_snippets/remote/ntp_snippets_database.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_REMOTE_NTP_SNIPPETS_DATABASE_H_
 #define COMPONENTS_NTP_SNIPPETS_REMOTE_NTP_SNIPPETS_DATABASE_H_
 
 #include <memory>
 #include <set>
 #include <string>
@@ skipping 43 matching lines @@
   void LoadSnippets(const SnippetsCallback& callback);
 
   // Adds or updates the given snippet.
   void SaveSnippet(const NTPSnippet& snippet);
   // Adds or updates all the given snippets.
   void SaveSnippets(const NTPSnippet::PtrVector& snippets);
 
   // Deletes the snippet with the given ID.
   void DeleteSnippet(const std::string& snippet_id);
   // Deletes all the given snippets (identified by their IDs).
-  void DeleteSnippets(std::unique_ptr<std::vector<std::string>> keys_to_remove);
+  void DeleteSnippets(std::unique_ptr<std::vector<std::string>> snippet_ids);
 
   // Loads the image data for the snippet with the given ID and passes it to
   // |callback|. Passes an empty string if not found.
   void LoadImage(const std::string& snippet_id,
                  const SnippetImageCallback& callback);
 
   // Adds or updates the image data for the given snippet ID.
   void SaveImage(const std::string& snippet_id, const std::string& image_data);
 
   // Deletes the image data for the given snippet ID.
@@ skipping 55 matching lines @@
   base::Closure error_callback_;
 
   base::WeakPtrFactory<NTPSnippetsDatabase> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(NTPSnippetsDatabase);
 };
 
 }  // namespace ntp_snippets
 
 #endif  // COMPONENTS_NTP_SNIPPETS_REMOTE_NTP_SNIPPETS_DATABASE_H_