Remove ENABLE(FILE_SYSTEM) compile-time flag.

Source/WebCore/html/HTMLInputElement.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  * Copyright (C) 2007 Samuel Weinig (sam@webkit.org)
  * Copyright (C) 2010 Google Inc. All rights reserved.
  * Copyright (C) 2008 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2012 Samsung Electronics. All rights reserved.
@@ skipping 1349 matching lines @@
 void HTMLInputElement::setFiles(PassRefPtr<FileList> files)
 {
     m_inputType->setFiles(files);
 }
 
 bool HTMLInputElement::receiveDroppedFiles(const DragData* dragData)
 {
     return m_inputType->receiveDroppedFiles(dragData);
 }
 
-#if ENABLE(FILE_SYSTEM)
 String HTMLInputElement::droppedFileSystemId()
 {
     return m_inputType->droppedFileSystemId();
 }
-#endif
 
 Icon* HTMLInputElement::icon() const
 {
     return m_inputType->icon();
 }
 
 bool HTMLInputElement::canReceiveDroppedFiles() const
 {
     return m_canReceiveDroppedFiles;
 }
@@ skipping 594 matching lines @@
 }
 
 #if ENABLE(INPUT_MULTIPLE_FIELDS_UI)
 PassRefPtr<RenderStyle> HTMLInputElement::customStyleForRenderer()
 {
     return m_inputType->customStyleForRenderer(document()->styleResolver()->styleForElement(this));
 }
 #endif
 
 } // namespace