Fix inconsistencies wrt whitespaces.

src/char-predicates.h

Index: src/char-predicates.h
diff --git a/src/char-predicates.h b/src/char-predicates.h
index 767ad6513afa7e3d5995a31a1df22372bf7a9484..743693157f1f76033942e10b40ac9c6eb3b59223 100644
--- a/src/char-predicates.h
+++ b/src/char-predicates.h
@@ -66,6 +66,14 @@ struct IdentifierPart {
   }
 };
 
+
+struct WhiteSpace {
+  static inline bool Is(uc32 c) {
+    return unibrow::WhiteSpace::Is(c) ||
+        c == 0xFEFF;  // BYTE ORDER MARK is a white space in ECMA-262 5.1, 7.2.
+  }
+};
+
 } }  // namespace v8::internal
 
 #endif  // V8_CHAR_PREDICATES_H_