Oilpan: Enable oilpan for callback classes

Source/modules/filesystem/DirectoryReader.h

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 34 matching lines @@
 class DirectoryReader : public DirectoryReaderBase, public ScriptWrappable {
     DEFINE_WRAPPERTYPEINFO();
 public:
     static DirectoryReader* create(DOMFileSystemBase* fileSystem, const String& fullPath)
     {
         return new DirectoryReader(fileSystem, fullPath);
     }
 
     virtual ~DirectoryReader();
 
-    void readEntries(PassOwnPtrWillBeRawPtr<EntriesCallback>, PassOwnPtrWillBeRawPtr<ErrorCallback> = nullptr);
+    void readEntries(EntriesCallback*, ErrorCallback* = nullptr);
 
     DOMFileSystem* filesystem() const { return static_cast<DOMFileSystem*>(m_fileSystem.get()); }
 
     virtual void trace(Visitor*) OVERRIDE;
 
 private:
     class EntriesCallbackHelper;
     class ErrorCallbackHelper;
 
     DirectoryReader(DOMFileSystemBase*, const String& fullPath);
 
     void addEntries(const EntryHeapVector& entries);
 
     void onError(FileError*);
 
     bool m_isReading;
     EntryHeapVector m_entries;
     RefPtrWillBeMember<FileError> m_error;
-    OwnPtrWillBeMember<EntriesCallback> m_entriesCallback;
-    OwnPtrWillBeMember<ErrorCallback> m_errorCallback;
+    Member<EntriesCallback> m_entriesCallback;
+    Member<ErrorCallback> m_errorCallback;
 };
 
 } // namespace blink
 
 #endif // DirectoryReader_h