Remove ENABLE(FILE_SYSTEM) compile-time flag.

Source/WebCore/platform/AsyncFileSystem.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 AsyncFileSystem_h
 #define AsyncFileSystem_h
 
-#if ENABLE(FILE_SYSTEM)
-
 #include "FileSystemType.h"
 #include "KURL.h"
 #include "Timer.h"
 #include <wtf/PassOwnPtr.h>
 #include <wtf/text/WTFString.h>
 
 namespace WebCore {
 
 class AsyncFileSystem;
 class AsyncFileSystemCallbacks;
@@ skipping 87 matching lines @@
     //
     // Note: the returned metadata info is cached in the File object for non-regular filesystem types (neither Temporary nor Persistent). The port could return valid metadata if it wants File object to cache metadata (e.g. if the file body is on a remote server), but otherwise should NOT return valid metadata.
     virtual void createSnapshotFileAndReadMetadata(const KURL& path, PassOwnPtr<AsyncFileSystemCallbacks>) = 0;
 
 protected:
     AsyncFileSystem() { }
 };
 
 } // namespace WebCore
 
-#endif // ENABLE(FILE_SYSTEM)
-
 #endif // AsyncFileSystem_h