Build WTF as dll in component build

Source/wtf/WTFExport.h

 /*
  * Copyright (C) 2013 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 10 matching lines @@
  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  * OWNER 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 StyleBuilder_h
-#define StyleBuilder_h
 
-#include "CSSPropertyNames.h"
+#ifndef WTFExport_h
+#define WTFExport_h
 
-namespace WebCore {
+#if !defined(WTF_IMPLEMENTATION)
+#define WTF_IMPLEMENTATION 0
+#endif
 
-class CSSValue;
-class StyleResolver;
+#if defined(COMPONENT_BUILD)
+#if defined(WIN32)
+#if WTF_IMPLEMENTATION
+#define WTF_EXPORT __declspec(dllexport)
+#else
+#define WTF_EXPORT __declspec(dllimport)
+#endif
+#else // defined(WIN32)
+#define WTF_EXPORT __attribute__((visibility("default")))
+#endif
+#else // defined(COMPONENT_BUILD)
+#define WTF_EXPORT
+#endif
 
-class StyleBuilder {
-public:
-    static bool applyProperty(CSSPropertyID, StyleResolver*, CSSValue*, bool isInitial, bool isInherit);
-};
-
-}
-
-#endif
+#endif // WTFExport_h