Create ShareableFileReference on IO thread

webkit/fileapi/local_file_util.cc

 // Copyright (c) 2012 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 "webkit/fileapi/local_file_util.h"
 
 #include "base/file_util_proxy.h"
 #include "googleurl/src/gurl.h"
 #include "webkit/fileapi/file_system_context.h"
 #include "webkit/fileapi/file_system_mount_point_provider.h"
@@ skipping 251 matching lines @@
 PlatformFileError LocalFileUtil::DeleteSingleDirectory(
     FileSystemOperationContext* context,
     const FileSystemURL& url) {
   FilePath file_path;
   PlatformFileError error = GetLocalFilePath(context, url, &file_path);
   if (error != base::PLATFORM_FILE_OK)
     return error;
   return NativeFileUtil::DeleteSingleDirectory(file_path);
 }
 
-scoped_refptr<webkit_blob::ShareableFileReference>
-LocalFileUtil::CreateSnapshotFile(
+base::PlatformFileError LocalFileUtil::CreateSnapshotFile(
     FileSystemOperationContext* context,
     const FileSystemURL& url,
-    base::PlatformFileError* result,
     base::PlatformFileInfo* file_info,
-    FilePath* platform_path) {
-  DCHECK(result);
-  *result = GetFileInfo(context, url, file_info, platform_path);
-  // We don't want the third party to delete our local file, so just returning
-  // NULL.
-  return NULL;
+    FilePath* platform_path,
+    SnapshotFilePolicy* policy) {
+  DCHECK(policy);
+  // We're just returning the local file information.
+  *policy = kSnapshotFileLocal;
+  return GetFileInfo(context, url, file_info, platform_path);
 }
 
 }  // namespace fileapi