Fix webkitGetEntry for non-native files.

third_party/WebKit/Source/core/clipboard/DraggedIsolatedFileSystem.cpp

 // 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 "core/clipboard/DraggedIsolatedFileSystem.h"
 
 namespace blink {
 
 DraggedIsolatedFileSystem::FileSystemIdPreparationCallback
     DraggedIsolatedFileSystem::s_prepareCallback = nullptr;
 
 void DraggedIsolatedFileSystem::init(
     DraggedIsolatedFileSystem::FileSystemIdPreparationCallback callback) {
   ASSERT(!s_prepareCallback);
   s_prepareCallback = callback;
 }
 
-void DraggedIsolatedFileSystem::prepareForDataObject(
-    DataObject* dataObject,
-    const String& filesystemId) {
+void DraggedIsolatedFileSystem::prepareForDataObject(DataObject* dataObject) {
   ASSERT(s_prepareCallback);
-  (*s_prepareCallback)(dataObject, filesystemId);
+  (*s_prepareCallback)(dataObject);
 }
 
 }  // namespace blink