Enable Oilpan by default in modules/filesystem/

Source/modules/filesystem/DraggedIsolatedFileSystem.h

 /*
  * Copyright (C) 2012 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 22 matching lines @@
 
 #include "core/clipboard/DataObject.h"
 #include "platform/heap/Handle.h"
 #include "wtf/Forward.h"
 #include "wtf/text/WTFString.h"
 
 namespace WebCore {
 
 class DOMFileSystem;
 
 class DraggedIsolatedFileSystem FINAL : public NoBaseWillBeGarbageCollectedFinalized<DraggedIsolatedFileSystem>, public WillBeHeapSupplement<DataObject> {

[haraken, 2014/06/07 08:11:04]

Is there any reason why you didn't enable oilpan by default for
DraggedIsolatedFileSystem?

[sof, 2014/06/07 13:18:53]

DataObject hasn't been put on the heap by default yet. Consequently, its
Supplements cannot be on the heap by default either.

     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(DraggedIsolatedFileSystem);
 public:
     virtual ~DraggedIsolatedFileSystem();
 
     static PassOwnPtrWillBeRawPtr<DraggedIsolatedFileSystem> create(DataObject& host, const String& filesystemId)
     {
         return adoptPtrWillBeNoop(new DraggedIsolatedFileSystem(host, filesystemId));
     }
 
     static DOMFileSystem* getDOMFileSystem(DataObject* host, ExecutionContext*);
 
     static const char* supplementName();
     static DraggedIsolatedFileSystem* from(DataObject*);
 
     void trace(Visitor*);
 
 private:
     DraggedIsolatedFileSystem(DataObject& host, const String& filesystemId);
-    RefPtrWillBeMember<DOMFileSystem> m_filesystem;
+    PersistentWillBeMember<DOMFileSystem> m_filesystem;
 };
 
 } // namespace WebCore
 
 #endif // DraggedIsolatedFileSystem_h