mojo: Fix leveldb unittests by making fs::Directories cloneable.

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>
 
 #include "base/files/file_path.h"
 #include "base/files/scoped_file.h"
 #include "base/macros.h"
 #include "components/filesystem/public/interfaces/directory.mojom.h"
+#include "components/filesystem/shared_temp_dir.h"
 #include "mojo/public/cpp/bindings/interface_request.h"
 #include "mojo/public/cpp/bindings/strong_binding.h"
 
-namespace base {
-class ScopedTempDir;
-}  // namespace base
-
 namespace filesystem {
 
 class LockTable;
 
 class DirectoryImpl : public Directory {
  public:
   // Set |temp_dir| only if there's a temporary directory that should be deleted
   // when this object is destroyed.
   DirectoryImpl(mojo::InterfaceRequest<Directory> request,
                 base::FilePath directory_path,
-                std::unique_ptr<base::ScopedTempDir> temp_dir,
+                scoped_refptr<SharedTempDir> temp_dir,
                 scoped_refptr<LockTable> lock_table);
   ~DirectoryImpl() override;
 
   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,
@@ skipping 13 matching lines @@
   void Delete(const mojo::String& path,
               uint32_t delete_flags,
               const DeleteCallback& callback) override;
   void Exists(const mojo::String& path,
               const ExistsCallback& callback) override;
   void IsWritable(const mojo::String& path,
                   const IsWritableCallback& callback) override;
   void Flush(const FlushCallback& callback) override;
   void StatFile(const mojo::String& path,
                 const StatFileCallback& callback) override;
+  void Clone(mojo::InterfaceRequest<Directory> directory) override;
   void ReadEntireFile(const mojo::String& path,
                       const ReadEntireFileCallback& callback) override;
   void WriteFile(const mojo::String& path,
                  mojo::Array<uint8_t> data,
                  const WriteFileCallback& callback) override;
 
  private:
   mojo::StrongBinding<Directory> binding_;
   base::FilePath directory_path_;
-  std::unique_ptr<base::ScopedTempDir> temp_dir_;
+  scoped_refptr<SharedTempDir> temp_dir_;
   scoped_refptr<LockTable> lock_table_;
 
   DISALLOW_COPY_AND_ASSIGN(DirectoryImpl);
 };
 
 }  // namespace filesystem
 
 #endif  // COMPONENTS_FILESYSTEM_DIRECTORY_IMPL_H_