Standardize usage of virtual/override/final in net/

net/extras/sqlite/sqlite_channel_id_store.h

Index: net/extras/sqlite/sqlite_channel_id_store.h
diff --git a/net/extras/sqlite/sqlite_channel_id_store.h b/net/extras/sqlite/sqlite_channel_id_store.h
index e743ba63a524590eee3848fa0382ce014ed806f8..fc85458c43eb8d0641ca93ad37b4d3ded0c4b64f 100644
--- a/net/extras/sqlite/sqlite_channel_id_store.h
+++ b/net/extras/sqlite/sqlite_channel_id_store.h
@@ -36,18 +36,18 @@ class SQLiteChannelIDStore : public DefaultChannelIDStore::PersistentStore {
       const scoped_refptr<base::SequencedTaskRunner>& background_task_runner);
 
   // DefaultChannelIDStore::PersistentStore:
-  virtual void Load(const LoadedCallback& loaded_callback) override;
-  virtual void AddChannelID(
+  void Load(const LoadedCallback& loaded_callback) override;
+  void AddChannelID(
       const DefaultChannelIDStore::ChannelID& channel_id) override;
-  virtual void DeleteChannelID(
+  void DeleteChannelID(
       const DefaultChannelIDStore::ChannelID& channel_id) override;
-  virtual void SetForceKeepSessionState() override;
+  void SetForceKeepSessionState() override;
 
   // Delete channel ids from servers in |server_identifiers|.
   void DeleteAllInList(const std::list<std::string>& server_identifiers);
 
  private:
-  virtual ~SQLiteChannelIDStore();
+  ~SQLiteChannelIDStore() override;
 
   class Backend;