Replace base::File wrapping with typemapping.

components/filesystem/file_impl.cc

 // 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.
 
 #include "components/filesystem/file_impl.h"
 
 #include <stddef.h>
 #include <stdint.h>
 #include <limits>
 #include <utility>
 
 #include "base/files/file_path.h"
 #include "base/files/scoped_file.h"
 #include "base/logging.h"
 #include "build/build_config.h"
 #include "components/filesystem/lock_table.h"
 #include "components/filesystem/shared_temp_dir.h"
 #include "components/filesystem/util.h"
 #include "mojo/common/common_type_converters.h"
 #include "mojo/public/cpp/bindings/strong_binding.h"
-#include "mojo/public/cpp/system/platform_handle.h"
 
 static_assert(sizeof(off_t) <= sizeof(int64_t), "off_t too big");
 static_assert(sizeof(size_t) >= sizeof(uint32_t), "size_t too small");
 
 using base::Time;
-using mojo::ScopedHandle;
 
 namespace filesystem {
 namespace {
 
 const size_t kMaxReadSize = 1 * 1024 * 1024;  // 1 MB.
 
 }  // namespace
 
 FileImpl::FileImpl(const base::FilePath& path,
                    uint32_t flags,
@@ skipping 282 matching lines @@
       static_cast<filesystem::mojom::FileError>(lock_table_->LockFile(this)));
 }
 
 void FileImpl::Unlock(const UnlockCallback& callback) {
   callback.Run(
       static_cast<filesystem::mojom::FileError>(lock_table_->UnlockFile(this)));
 }
 
 void FileImpl::AsHandle(const AsHandleCallback& callback) {
   if (!file_.IsValid()) {
-    callback.Run(GetError(file_), ScopedHandle());
+    callback.Run(GetError(file_), base::File());
     return;
   }
 
   base::File new_file = file_.Duplicate();
   if (!new_file.IsValid()) {
-    callback.Run(GetError(new_file), ScopedHandle());
+    callback.Run(GetError(new_file), base::File());
     return;
   }
 
   base::File::Info info;
   if (!new_file.GetInfo(&info)) {
-    callback.Run(mojom::FileError::FAILED, ScopedHandle());
+    callback.Run(mojom::FileError::FAILED, base::File());
     return;
   }
 
   // Perform one additional check right before we send the file's file
   // descriptor over mojo. This is theoretically redundant, but given that
   // passing a file descriptor to a directory is a sandbox escape on Windows,
   // we should be absolutely paranoid.
   if (info.is_directory) {
-    callback.Run(mojom::FileError::NOT_A_FILE, ScopedHandle());
+    callback.Run(mojom::FileError::NOT_A_FILE, base::File());
     return;
   }
 
-  callback.Run(mojom::FileError::OK,
-               mojo::WrapPlatformFile(new_file.TakePlatformFile()));
+  callback.Run(mojom::FileError::OK, std::move(new_file));
 }
 
 }  // namespace filesystem