Remove ENABLE(FILE_SYSTEM) compile-time flag.

Source/WebKit/chromium/src/WebFileSystemCallbacksImpl.cpp

 /*
  * 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 12 matching lines @@
  * 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.
  */
 #include "config.h"
 #include "WebFileSystemCallbacksImpl.h"
 
-#if ENABLE(FILE_SYSTEM)
-
 #include "AsyncFileSystemCallbacks.h"
 #include "AsyncFileSystemChromium.h"
 #include "FileMetadata.h"
 #include "ScriptExecutionContext.h"
 #include "WorkerAsyncFileSystemChromium.h"
 #include <public/WebFileInfo.h>
 #include <public/WebFileSystem.h>
 #include <public/WebFileSystemEntry.h>
 #include <public/WebString.h>
 #include <wtf/Vector.h>
@@ skipping 74 matching lines @@
     m_callbacks->didOpenFileSystem(name, rootURL, AsyncFileSystemChromium::create());
 }
 
 void WebFileSystemCallbacksImpl::didFail(WebFileError error)
 {
     m_callbacks->didFail(error);
     delete this;
 }
 
 } // namespace WebKit
-
-#endif // ENABLE(FILE_SYSTEM)