Oilpan: add transition types to FileSystem APIs.

Source/modules/filesystem/DirectoryReaderBase.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 13 matching lines @@
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef DirectoryReaderBase_h
 #define DirectoryReaderBase_h
 
+#include "heap/Handle.h"
 #include "modules/filesystem/DOMFileSystemBase.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefCounted.h"
 #include "wtf/text/WTFString.h"
 
 namespace WebCore {
 
-class DirectoryReaderBase : public RefCounted<DirectoryReaderBase> {
+class DirectoryReaderBase : public RefCountedWillBeGarbageCollectedFinalized<DirectoryReaderBase> {
 public:
     DOMFileSystemBase* filesystem() const { return m_fileSystem.get(); }
     void setHasMoreEntries(bool hasMoreEntries) { m_hasMoreEntries = hasMoreEntries; }
 
     virtual ~DirectoryReaderBase() { }
 
+    virtual void trace(Visitor* visitor)
+    {
+        visitor->trace(m_fileSystem);
+    }
+
 protected:
-    DirectoryReaderBase(PassRefPtr<DOMFileSystemBase> fileSystem, const String& fullPath)
+    DirectoryReaderBase(PassRefPtrWillBeRawPtr<DOMFileSystemBase> fileSystem, const String& fullPath)
         : m_fileSystem(fileSystem)
         , m_fullPath(fullPath)
         , m_hasMoreEntries(true)
     {
     }
 
-    RefPtr<DOMFileSystemBase> m_fileSystem;
+    RefPtrWillBeMember<DOMFileSystemBase> m_fileSystem;
 
     // This is a virtual path.
     String m_fullPath;
 
     bool m_hasMoreEntries;
 };
 
 } // namespace WebCore
 
 #endif // DirectoryReaderBase_h