Move //mojo/services/X/public/... to //mojo/services/X/... (part 1).

mojo/services/files/public/c/lib/fd_table.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 SERVICES_FILES_C_LIB_FD_TABLE_H_
-#define SERVICES_FILES_C_LIB_FD_TABLE_H_
-
-#include <stddef.h>
-
-#include <memory>
-#include <vector>
-
-#include "files/public/c/lib/fd_impl.h"
-#include "mojo/public/cpp/system/macros.h"
-
-namespace mojio {
-
-class ErrnoImpl;
-
-// A simple (thread-unsafe) implementation of an FD (file descriptor) table,
-// mapping FDs (integers) to |FDImpl|s. (Note that on failure, all the methods
-// set "errno" using the |ErrnoImpl| provided to the constructor.)
-class FDTable {
- public:
-  // The |ErrnoImpl| must outlive this object. |max_num_fds| is the maximum
-  // number of FDs allowed (simultaneously). This number should be relatively
-  // small (hundreds to maybe tens of thousands, certainly not millions).
-  FDTable(ErrnoImpl* errno_impl, size_t max_num_fds);
-  // Note: This does not |Close()| any remaining |FDImpl|s.
-  ~FDTable();
-
-  // Returns the new FD (>= 0) on success and -1 on failure. Note that the
-  // lowest-valued FD available is always allocated.
-  int Add(std::unique_ptr<FDImpl> fd_impl);
-
-  // Returns the |FDImpl| associated to |fd| (null if |fd| is not valid),
-  // keeping the |FDImpl| in the table (and thus |fd| valid).
-  FDImpl* Get(int fd) const;
-
-  // Removes and returns the |FDImpl| associated to |fd| (null if |fd| is not
-  // valid). Note that |Close()| is not called on the |FDImpl|.
-  std::unique_ptr<FDImpl> Remove(int fd);
-
-  ErrnoImpl* errno_impl() const { return errno_impl_; }
-  size_t max_num_fds() const { return table_.size(); }
-
- private:
-  ErrnoImpl* const errno_impl_;
-  std::vector<std::unique_ptr<FDImpl>> table_;
-
-  MOJO_DISALLOW_COPY_AND_ASSIGN(FDTable);
-};
-
-}  // namespace mojio
-
-#endif  // SERVICES_FILES_C_LIB_FD_TABLE_H_