Oilpan: Enable oilpan for callback classes

Source/modules/filesystem/FileEntry.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 30 matching lines @@
 class FileWriterCallback;
 
 class FileEntry FINAL : public Entry {
     DEFINE_WRAPPERTYPEINFO();
 public:
     static FileEntry* create(DOMFileSystemBase* fileSystem, const String& fullPath)
     {
         return new FileEntry(fileSystem, fullPath);
     }
 
-    void createWriter(PassOwnPtrWillBeRawPtr<FileWriterCallback>, PassOwnPtrWillBeRawPtr<ErrorCallback> = nullptr);
-    void file(PassOwnPtrWillBeRawPtr<FileCallback>, PassOwnPtrWillBeRawPtr<ErrorCallback> = nullptr);
+    void createWriter(FileWriterCallback*, ErrorCallback* = nullptr);
+    void file(FileCallback*, ErrorCallback* = nullptr);
 
     virtual bool isFile() const OVERRIDE { return true; }
 
     virtual void trace(Visitor*) OVERRIDE;
 
 private:
     FileEntry(DOMFileSystemBase*, const String& fullPath);
 };
 
 DEFINE_TYPE_CASTS(FileEntry, Entry, entry, entry->isFile(), entry.isFile());
 
 } // namespace blink
 
 #endif // FileEntry_h