Make helper functions compatible with larger ToBooleanStub types.

src/type-info.h

Index: src/type-info.h
diff --git a/src/type-info.h b/src/type-info.h
index 58a40cf34b56a501dbb4c323aeac9f856f7d9c7d..965fca30109aeb3b8db8c892f88d0608f9c7a830 100644
--- a/src/type-info.h
+++ b/src/type-info.h
@@ -78,7 +78,7 @@ class TypeFeedbackOracle: public ZoneObject {
   // TODO(1571) We can't use ToBooleanStub::Types as the return value because
   // of various cycles in our headers. Death to tons of implementations in
   // headers!! :-P
-  byte ToBooleanTypes(TypeFeedbackId id);
+  uint16_t ToBooleanTypes(TypeFeedbackId id);
 
   // Get type information for arithmetic operations and compares.
   void BinaryType(TypeFeedbackId id,