Revert of Deletes mojo::Callback

components/filesystem/directory_impl.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_FILESYSTEM_DIRECTORY_IMPL_H_
 #define COMPONENTS_FILESYSTEM_DIRECTORY_IMPL_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 13 matching lines @@
 class DirectoryImpl : public mojom::Directory {
  public:
   // Set |temp_dir| only if there's a temporary directory that should be deleted
   // when this object is destroyed.
   DirectoryImpl(mojo::InterfaceRequest<mojom::Directory> request,
                 base::FilePath directory_path,
                 scoped_refptr<SharedTempDir> temp_dir,
                 scoped_refptr<LockTable> lock_table);
   ~DirectoryImpl() override;
 
-  void set_connection_error_handler(const base::Closure& error_handler) {
+  void set_connection_error_handler(const mojo::Closure& error_handler) {
     binding_.set_connection_error_handler(error_handler);
   }
 
   // |Directory| implementation:
   void Read(const ReadCallback& callback) override;
   void OpenFile(const mojo::String& path,
                 mojo::InterfaceRequest<mojom::File> file,
                 uint32_t open_flags,
                 const OpenFileCallback& callback) override;
   void OpenFileHandle(const mojo::String& path,
@@ skipping 34 matching lines @@
   base::FilePath directory_path_;
   scoped_refptr<SharedTempDir> temp_dir_;
   scoped_refptr<LockTable> lock_table_;
 
   DISALLOW_COPY_AND_ASSIGN(DirectoryImpl);
 };
 
 }  // namespace filesystem
 
 #endif  // COMPONENTS_FILESYSTEM_DIRECTORY_IMPL_H_