Enable Oilpan by default in modules/filesystem/

Source/modules/filesystem/FileWriter.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 @@
 #include "public/platform/WebFileWriterClient.h"
 #include "wtf/RefPtr.h"
 
 namespace WebCore {
 
 class Blob;
 class ExceptionState;
 class ExecutionContext;
 
 class FileWriter FINAL : public FileWriterBase, public ScriptWrappable, public ActiveDOMObject, public EventTargetWithInlineData, public blink::WebFileWriterClient {
-    REFCOUNTED_EVENT_TARGET(FileWriterBase);
+    DEFINE_EVENT_TARGET_REFCOUNTING(RefCountedGarbageCollected<FileWriterBase>);
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(FileWriter);
 public:
-    static PassRefPtrWillBeRawPtr<FileWriter> create(ExecutionContext*);
+    static FileWriter* create(ExecutionContext*);
 
     enum ReadyState {
         INIT = 0,
         WRITING = 1,
         DONE = 2
     };
 
     void write(Blob*, ExceptionState&);
     void seek(long long position, ExceptionState&);
     void truncate(long long length, ExceptionState&);
@@ skipping 53 matching lines @@
     long long m_truncateLength;
     long long m_numAborts;
     long long m_recursionDepth;
     double m_lastProgressNotificationTimeMS;
     RefPtrWillBeMember<Blob> m_blobBeingWritten;
 };
 
 } // namespace WebCore
 
 #endif // FileWriter_h