Change some snapshot- or temporary-file related changes to use ScopedFile

chrome/browser/media_galleries/fileapi/device_media_async_file_util.h

Index: chrome/browser/media_galleries/fileapi/device_media_async_file_util.h
diff --git a/chrome/browser/media_galleries/fileapi/device_media_async_file_util.h b/chrome/browser/media_galleries/fileapi/device_media_async_file_util.h
index dde43a8dbf034e7cc31bb5286c268f76e866a72a..3a32f6741b6ce5b6131692af0bbf4d40a6df2c29 100644
--- a/chrome/browser/media_galleries/fileapi/device_media_async_file_util.h
+++ b/chrome/browser/media_galleries/fileapi/device_media_async_file_util.h
@@ -11,6 +11,7 @@
 #include "webkit/fileapi/async_file_util.h"
 
 namespace base {
+class SequencedTaskRunner;
 class Time;
 }
 
@@ -142,6 +143,7 @@ class DeviceMediaAsyncFileUtil : public fileapi::AsyncFileUtil {
   // the CreateSnapshotFile request.
   void OnDidCreateSnapshotFile(
       const AsyncFileUtil::CreateSnapshotFileCallback& callback,
+      base::SequencedTaskRunner* media_task_runner,
       const base::PlatformFileInfo& file_info,
       const base::FilePath& platform_path);