Oilpan: Allocate all EventTarget derived types on the manged heap.

Source/modules/filesystem/FileWriter.cpp

 /*
  * 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 305 matching lines @@
     ASSERT(errorCode);
     FileError::throwDOMException(exceptionState, errorCode);
     m_error = FileError::create(errorCode);
 }
 
 void FileWriter::trace(Visitor* visitor)
 {
     visitor->trace(m_error);
     visitor->trace(m_blobBeingWritten);
     FileWriterBase::trace(visitor);
+    EventTargetWithInlineData::trace(visitor);
 }
 
 } // namespace WebCore