Clean up forward declarations in Source/modules

Source/modules/filesystem/HTMLInputElementFileSystem.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 17 matching lines @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef HTMLInputElementFileSystem_h
 #define HTMLInputElementFileSystem_h
 
 #include "modules/filesystem/EntriesCallback.h"
 
 namespace blink {
 
-class Entry;
 class HTMLInputElement;
 class ExecutionContext;
 
 class HTMLInputElementFileSystem {
 public:
     static EntryHeapVector webkitEntries(ExecutionContext*, HTMLInputElement&);
 
 private:
     HTMLInputElementFileSystem();
     ~HTMLInputElementFileSystem();
 };
 
 } // namespace blink
 
 #endif // HTMLInputElementFileSystem_h