Use ArcFileSystemInstance to access files on ARC.

chrome/browser/chromeos/arc/fileapi/arc_file_system_instance_util.h

 // 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.
 
-#ifndef CHROME_BROWSER_CHROMEOS_ARC_FILEAPI_INTENT_HELPER_UTIL_H_
-#define CHROME_BROWSER_CHROMEOS_ARC_FILEAPI_INTENT_HELPER_UTIL_H_
+#ifndef CHROME_BROWSER_CHROMEOS_ARC_FILEAPI_ARC_FILE_SYSTEM_INSTANCE_UTIL_H_
+#define CHROME_BROWSER_CHROMEOS_ARC_FILEAPI_ARC_FILE_SYSTEM_INSTANCE_UTIL_H_
 
-#include "components/arc/common/intent_helper.mojom.h"
-#include "url/gurl.h"
+#include "components/arc/common/file_system.mojom.h"
+
+class GURL;
 
 namespace arc {
-namespace intent_helper_util {
+namespace file_system_instance_util {
 
-using GetFileSizeCallback =
-    mojom::IntentHelperInstance::GetFileSizeDeprecatedCallback;
+using GetFileSizeCallback = mojom::FileSystemInstance::GetFileSizeCallback;
 using OpenFileToReadCallback =
-    mojom::IntentHelperInstance::OpenFileToReadDeprecatedCallback;
+    mojom::FileSystemInstance::OpenFileToReadCallback;
 
 // Utility which posts a task to run GetFileSize.
 // This function must be called on the IO thread.
 void GetFileSizeOnIOThread(const GURL& arc_url,
                            const GetFileSizeCallback& callback);
 
 // Utility which posts a task to run OpenFileToRead.
 // This function must be called on the IO thread.
 void OpenFileToReadOnIOThread(const GURL& arc_url,
                               const OpenFileToReadCallback& callback);
 
-}  // namespace intent_helper_util
+}  // namespace file_system_instance_util
 }  // namespace arc
 
-#endif  // CHROME_BROWSER_CHROMEOS_ARC_FILEAPI_INTENT_HELPER_UTIL_H_
+#endif  // CHROME_BROWSER_CHROMEOS_ARC_FILEAPI_ARC_FILE_SYSTEM_INSTANCE_UTIL_H_