Add an Ioctl() message to the File interface.

services/files/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 SERVICES_FILES_FILE_IMPL_H_
 #define SERVICES_FILES_FILE_IMPL_H_
 
 #include "base/files/scoped_file.h"
 #include "base/macros.h"
 #include "mojo/public/cpp/bindings/interface_request.h"
@@ skipping 35 matching lines @@
   void Stat(const StatCallback& callback) override;
   void Truncate(int64_t size, const TruncateCallback& callback) override;
   void Touch(TimespecOrNowPtr atime,
              TimespecOrNowPtr mtime,
              const TouchCallback& callback) override;
   void Dup(InterfaceRequest<File> file, const DupCallback& callback) override;
   void Reopen(InterfaceRequest<File> file,
               uint32_t open_flags,
               const ReopenCallback& callback) override;
   void AsBuffer(const AsBufferCallback& callback) override;
+  void Ioctl(uint32_t request,
+             Array<uint32_t> in_values,
+             const IoctlCallback& callback);
 
  private:
   StrongBinding<File> binding_;
   base::ScopedFD file_fd_;
 
   DISALLOW_COPY_AND_ASSIGN(FileImpl);
 };
 
 }  // namespace files
 }  // namespace mojo
 
 #endif  // SERVICES_FILES_FILE_IMPL_H_