Build WTF as dll in component build

Source/wtf/WTFExport.h

Index: Source/wtf/WTFExport.h
diff --git a/Source/core/css/resolver/StyleBuilder.h b/Source/wtf/WTFExport.h
similarity index 78%
copy from Source/core/css/resolver/StyleBuilder.h
copy to Source/wtf/WTFExport.h
index ca5e5753f311abb17b3bc128166e2bfc176be8e6..3fbe52d447bd7db209edf2c8b85fd482336419c2 100644
--- a/Source/core/css/resolver/StyleBuilder.h
+++ b/Source/wtf/WTFExport.h
@@ -28,21 +28,26 @@
  * 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 {
-
-class CSSValue;
-class StyleResolver;
-
-class StyleBuilder {
-public:
-    static bool applyProperty(CSSPropertyID, StyleResolver*, CSSValue*, bool isInitial, bool isInherit);
-};
-
-}
+#if !defined(WTF_IMPLEMENTATION)
+#define WTF_IMPLEMENTATION 0
+#endif
 
+#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
+
+#endif // WTFExport_h