Remove ENABLE(FILE_SYSTEM) compile-time flag.

Source/WebCore/Modules/filesystem/DirectoryReader.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 DirectoryReader_h
 #define DirectoryReader_h
 
-#if ENABLE(FILE_SYSTEM)
-
 #include "DOMFileSystem.h"
 #include "DirectoryReaderBase.h"
 #include <wtf/PassRefPtr.h>
 #include <wtf/RefCounted.h>
 #include <wtf/text/WTFString.h>
 
 namespace WebCore {
 
 class EntriesCallback;
 class EntriesCallbacks;
 class ErrorCallback;
 
 class DirectoryReader : public DirectoryReaderBase {
 public:
     static PassRefPtr<DirectoryReader> create(PassRefPtr<DOMFileSystemBase> fileSystem, const String& fullPath)
     {
         return adoptRef(new DirectoryReader(fileSystem, fullPath));
     }
 
     void readEntries(PassRefPtr<EntriesCallback>, PassRefPtr<ErrorCallback> = 0);
 
     DOMFileSystem* filesystem() const { return static_cast<DOMFileSystem*>(m_fileSystem.get()); }
 
 private:
     DirectoryReader(PassRefPtr<DOMFileSystemBase>, const String& fullPath);
 };
 
 }
 
-#endif // ENABLE(FILE_SYSTEM)
-
 #endif // DirectoryReader_h