Enable Oilpan by default in modules/filesystem/

Source/modules/filesystem/FileWriterSync.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 26 matching lines @@
 #include "platform/heap/Handle.h"
 #include "public/platform/WebFileWriterClient.h"
 
 namespace WebCore {
 
 class Blob;
 class ExceptionState;
 
 class FileWriterSync FINAL : public FileWriterBase, public ScriptWrappable, public blink::WebFileWriterClient {
 public:
-    static PassRefPtrWillBeRawPtr<FileWriterSync> create()
+    static FileWriterSync* create()
     {
-        return adoptRefWillBeRefCountedGarbageCollected(new FileWriterSync());
+        return adoptRefCountedGarbageCollected(new FileWriterSync());
     }
     virtual ~FileWriterSync();
 
     // FileWriterBase
     void write(Blob*, ExceptionState&);
     void seek(long long position, ExceptionState&);
     void truncate(long long length, ExceptionState&);
 
     // WebFileWriterClient, via FileWriterBase
     virtual void didWrite(long long bytes, bool complete) OVERRIDE;
     virtual void didTruncate() OVERRIDE;
     virtual void didFail(blink::WebFileError) OVERRIDE;
 
 private:
     FileWriterSync();
     void prepareForWrite();
 
     FileError::ErrorCode m_error;
 #ifndef NDEBUG
     bool m_complete;
 #endif
 };
 
 } // namespace WebCore
 
 #endif // FileWriter_h