Build WTF as dll in component build

Source/wtf/DecimalNumber.h

Index: Source/wtf/DecimalNumber.h
diff --git a/Source/wtf/DecimalNumber.h b/Source/wtf/DecimalNumber.h
index 5d03070e9b291b1621d380b357b87b7b234763e9..dd68d67c64c96afef2a67486b6c105ef1c33d1be 100644
--- a/Source/wtf/DecimalNumber.h
+++ b/Source/wtf/DecimalNumber.h
@@ -27,16 +27,18 @@
 #define DecimalNumber_h
 
 #include <math.h>
-#include <wtf/dtoa.h>
-#include <wtf/MathExtras.h>
-#include <wtf/text/WTFString.h>
+
+#include "wtf/MathExtras.h"
+#include "wtf/WTFExport.h"
+#include "wtf/dtoa.h"
+#include "wtf/text/WTFString.h"
 
 namespace WTF {
 
 enum RoundingSignificantFiguresType { RoundingSignificantFigures };
 enum RoundingDecimalPlacesType { RoundingDecimalPlaces };
 
-class DecimalNumber {
+class WTF_EXPORT DecimalNumber {
 public:
     DecimalNumber(double d)
     {