Remove ENABLE(FILE_SYSTEM) compile-time flag.

Source/WebCore/Modules/filesystem/WorkerContextFileSystem.h

 /*
  * Copyright (C) 2008, 2009 Apple 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 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 WorkerContextFileSystem_h
 #define WorkerContextFileSystem_h
 
-#if ENABLE(FILE_SYSTEM)
-
 #include "DOMFileSystemSync.h"
 #include <wtf/PassRefPtr.h>
 
 namespace WebCore {
 
 class EntryCallback;
 class EntrySync;
 class ErrorCallback;
 class FileSystemCallback;
 class WorkerContext;
 
 class WorkerContextFileSystem {
 public:
     enum {
         TEMPORARY,
         PERSISTENT,
     };
 
     static void webkitRequestFileSystem(WorkerContext*, int type, long long size, PassRefPtr<FileSystemCallback> successCallback, PassRefPtr<ErrorCallback>);
     static PassRefPtr<DOMFileSystemSync> webkitRequestFileSystemSync(WorkerContext*, int type, long long size, ExceptionCode&);
     static void webkitResolveLocalFileSystemURL(WorkerContext*, const String& url, PassRefPtr<EntryCallback> successCallback, PassRefPtr<ErrorCallback>);
     static PassRefPtr<EntrySync> webkitResolveLocalFileSystemSyncURL(WorkerContext*, const String& url, ExceptionCode&);
 
 private:
     WorkerContextFileSystem();
-    ~WorkerContextFileSystem();    
+    ~WorkerContextFileSystem();
 };
 
 } // namespace WebCore
 
-#endif // ENABLE(FILE_SYSTEM)
-
 #endif // WorkerContextFileSystem_h