Make unittests work in component build

src/char-predicates.h

Index: src/char-predicates.h
diff --git a/src/char-predicates.h b/src/char-predicates.h
index 3161ae4ae930c408edf0b57729156f727c529053..966b2a59369adcccf3a1de5466ad7e431617b7fa 100644
--- a/src/char-predicates.h
+++ b/src/char-predicates.h
@@ -5,6 +5,7 @@
 #ifndef V8_CHAR_PREDICATES_H_
 #define V8_CHAR_PREDICATES_H_
 
+#include "src/globals.h"
 #include "src/unicode.h"
 
 namespace v8 {
@@ -25,8 +26,7 @@ inline bool IsBinaryDigit(uc32 c);
 inline bool IsRegExpWord(uc32 c);
 inline bool IsRegExpNewline(uc32 c);
 
-
-struct SupplementaryPlanes {
+struct V8_EXPORT_PRIVATE SupplementaryPlanes {
   static bool IsIDStart(uc32 c);
   static bool IsIDPart(uc32 c);
 };