Build WTF as dll in component build

Source/wtf/CurrentTime.h

Index: Source/wtf/CurrentTime.h
diff --git a/Source/wtf/CurrentTime.h b/Source/wtf/CurrentTime.h
index 0c4af8446891405eadd9d1c76db2b8e29f470e39..61eab62192dba8ebe19aa157afea45b1f6b6abf5 100644
--- a/Source/wtf/CurrentTime.h
+++ b/Source/wtf/CurrentTime.h
@@ -34,12 +34,19 @@
 
 #include <time.h>
 
+#include "wtf/WTFExport.h"
+
 namespace WTF {
 
+typedef double(*TimeFunction)(void);
+
+WTF_EXPORT void setCurrentTimeFunction(TimeFunction);
+WTF_EXPORT void setMonotonicallyIncreasingTimeFunction(TimeFunction);
+
 // Returns the current UTC time in seconds, counted from January 1, 1970.
 // Precision varies depending on platform but is usually as good or better
 // than a millisecond.
-double currentTime();
+WTF_EXPORT double currentTime();
 
 // Same thing, in milliseconds.
 inline double currentTimeMS()
@@ -49,7 +56,7 @@ inline double currentTimeMS()
 
 // Provides a monotonically increasing time in seconds since an arbitrary point in the past.
 // On unsupported platforms, this function only guarantees the result will be non-decreasing.
-double monotonicallyIncreasingTime();
+WTF_EXPORT double monotonicallyIncreasingTime();
 
 } // namespace WTF