Clean up unnecessary PassRefPtr.h include in modules

Source/modules/filesystem/DataTransferItemFileSystem.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 14 matching lines @@
  * 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 DataTransferItemFileSystem_h
 #define DataTransferItemFileSystem_h
 
 #include "platform/heap/Handle.h"
-#include "wtf/PassRefPtr.h"
 
 namespace WebCore {
 
 class DataTransferItem;
 class Entry;
 class ExecutionContext;
 
 class DataTransferItemFileSystem {
 public:
     static PassRefPtrWillBeRawPtr<Entry> webkitGetAsEntry(ExecutionContext*, DataTransferItem&);
 
 private:
     DataTransferItemFileSystem();
     ~DataTransferItemFileSystem();
 };
 
 } // namespace WebCore
 
 #endif // DataTransferItemFileSystem_h