LocalFileSystem::deleteFileSystem() is no longer used.

third_party/WebKit/Source/modules/filesystem/LocalFileSystem.h

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 49 matching lines @@
   LocalFileSystem(WorkerClients&, std::unique_ptr<FileSystemClient>);
   ~LocalFileSystem();
 
   void resolveURL(ExecutionContext*,
                   const KURL&,
                   std::unique_ptr<AsyncFileSystemCallbacks>);
   void requestFileSystem(ExecutionContext*,
                          FileSystemType,
                          long long size,
                          std::unique_ptr<AsyncFileSystemCallbacks>);
-  void deleteFileSystem(ExecutionContext*,
-                        FileSystemType,
-                        std::unique_ptr<AsyncFileSystemCallbacks>);
 
   FileSystemClient* client() const { return m_client.get(); }
 
   static const char* supplementName();
   static LocalFileSystem* from(ExecutionContext&);
 
   DECLARE_VIRTUAL_TRACE();
 
  private:
   WebFileSystem* getFileSystem() const;
   void fileSystemNotAvailable(ExecutionContext*, CallbackWrapper*);
 
   void requestFileSystemAccessInternal(ExecutionContext*,
                                        std::unique_ptr<WTF::Closure> allowed,
                                        std::unique_ptr<WTF::Closure> denied);
   void fileSystemNotAllowedInternal(ExecutionContext*, CallbackWrapper*);
   void fileSystemAllowedInternal(ExecutionContext*,
                                  FileSystemType,
                                  CallbackWrapper*);
   void resolveURLInternal(ExecutionContext*, const KURL&, CallbackWrapper*);
-  void deleteFileSystemInternal(ExecutionContext*,
-                                FileSystemType,
-                                CallbackWrapper*);
 
   std::unique_ptr<FileSystemClient> m_client;
 };
 
 }  // namespace blink
 
 #endif  // LocalFileSystem_h