Privatize StrongBinding lifetime management

components/filesystem/file_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_FILE_IMPL_H_
 #define COMPONENTS_FILESYSTEM_FILE_IMPL_H_
 
 #include <stdint.h>
 
 #include "base/files/file.h"
 #include "base/files/scoped_file.h"
 #include "base/macros.h"
 #include "components/filesystem/public/interfaces/directory.mojom.h"
 #include "mojo/public/cpp/bindings/interface_request.h"
-#include "mojo/public/cpp/bindings/strong_binding.h"
 
 namespace base {
 class FilePath;
 }
 
 namespace filesystem {
 
 class LockTable;
 class SharedTempDir;
 
 class FileImpl : public mojom::File {
  public:
-  FileImpl(mojo::InterfaceRequest<mojom::File> request,
-           const base::FilePath& path,
+  FileImpl(const base::FilePath& path,
            uint32_t flags,
            scoped_refptr<SharedTempDir> temp_dir,
            scoped_refptr<LockTable> lock_table);
-  FileImpl(mojo::InterfaceRequest<mojom::File> request,
-           const base::FilePath& path,
+  FileImpl(const base::FilePath& path,
            base::File file,
            scoped_refptr<SharedTempDir> temp_dir,
            scoped_refptr<LockTable> lock_table);
   ~FileImpl() override;
 
   // Returns whether the underlying file handle is valid.
   bool IsValid() const;
 
   // Attempts to perform the native operating system's locking operations on
   // the internal mojom::File handle
@@ skipping 14 matching lines @@
              const WriteCallback& callback) override;
   void Tell(const TellCallback& callback) override;
   void Seek(int64_t offset,
             mojom::Whence whence,
             const SeekCallback& callback) override;
   void Stat(const StatCallback& callback) override;
   void Truncate(int64_t size, const TruncateCallback& callback) override;
   void Touch(mojom::TimespecOrNowPtr atime,
              mojom::TimespecOrNowPtr mtime,
              const TouchCallback& callback) override;
-  void Dup(mojo::InterfaceRequest<mojom::File> file,
-           const DupCallback& callback) override;
+  void Dup(mojom::FileRequest file, const DupCallback& callback) override;
   void Flush(const FlushCallback& callback) override;
   void Lock(const LockCallback& callback) override;
   void Unlock(const UnlockCallback& callback) override;
   void AsHandle(const AsHandleCallback& callback) override;
 
  private:
-  mojo::StrongBinding<mojom::File> binding_;
   base::File file_;
   base::FilePath path_;
   scoped_refptr<SharedTempDir> temp_dir_;
   scoped_refptr<LockTable> lock_table_;
 
   DISALLOW_COPY_AND_ASSIGN(FileImpl);
 };
 
 }  // namespace filesystem
 
 #endif  // COMPONENTS_FILESYSTEM_FILE_IMPL_H_