Replace base::File wrapping with typemapping.

services/catalog/public/cpp/resource_loader.cc

 // Copyright 2016 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 "services/catalog/public/cpp/resource_loader.h"
 
 #include <stddef.h>
 #include <utility>
 
 #include "base/bind.h"
 #include "base/files/file.h"
 #include "components/filesystem/public/interfaces/directory.mojom.h"
 #include "mojo/public/cpp/system/platform_handle.h"
 #include "services/service_manager/public/cpp/connector.h"
 #include "services/service_manager/public/interfaces/interface_provider.mojom.h"
 
 namespace catalog {
 
-namespace {
-
-base::File GetFileFromHandle(mojo::ScopedHandle handle) {
-  CHECK(handle.is_valid());
-  base::PlatformFile platform_file;
-  CHECK_EQ(mojo::UnwrapPlatformFile(std::move(handle), &platform_file),
-           MOJO_RESULT_OK);
-  return base::File(platform_file);
-}
-
-}  // namespace
-
 ResourceLoader::ResourceLoader() {}
 ResourceLoader::~ResourceLoader() {}
 
 bool ResourceLoader::OpenFiles(filesystem::mojom::DirectoryPtr directory,
                                const std::set<std::string>& paths) {
   std::vector<filesystem::mojom::FileOpenDetailsPtr> details(paths.size());
   size_t i = 0;
   for (const auto& path : paths) {
     filesystem::mojom::FileOpenDetailsPtr open_details(
         filesystem::mojom::FileOpenDetails::New());
     open_details->path = path;
     open_details->open_flags =
         filesystem::mojom::kFlagOpen | filesystem::mojom::kFlagRead;
     details[i++] = std::move(open_details);
   }
 
   std::vector<filesystem::mojom::FileOpenResultPtr> results;
   if (!directory->OpenFileHandles(std::move(details), &results))
     return false;
 
   for (const auto& result : results) {
     resource_map_[result->path].reset(
-        new base::File(GetFileFromHandle(std::move(result->file_handle))));
+        new base::File(std::move(result->file_handle)));
   }
   return true;
 }
 
 base::File ResourceLoader::TakeFile(const std::string& path) {
   std::unique_ptr<base::File> file_wrapper(std::move(resource_map_[path]));
   resource_map_.erase(path);
   return std::move(*file_wrapper);
 }
 
 }  // namespace catalog