Enable support for CSS Conditional Rules

Source/core/css/DOMWindowCSS.h

 /*
  * Copyright (C) 2012 Motorola Mobility 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
@@ skipping 12 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 DOMWindowCSS_h
 #define DOMWindowCSS_h
 
-#if ENABLE(CSS3_CONDITIONAL_RULES)
-
 #include <wtf/Forward.h>
 #include <wtf/PassRefPtr.h>
 #include <wtf/RefCounted.h>
 
 namespace WebCore {
 
 class DOMWindowCSS : public RefCounted<DOMWindowCSS> {
 public:
     static PassRefPtr<DOMWindowCSS> create();
 
     bool supports(const String& property, const String& value) const;
     bool supports(const String& conditionText) const;
 
 private:
     DOMWindowCSS()
     {
     }
 };
 
 }
 
-#endif // ENABLE(CSS3_CONDITIONAL_RULES)
-
 #endif