Removed funky Maybe constructor and made fields private.

src/hydrogen-representation-changes.cc

Index: src/hydrogen-representation-changes.cc
diff --git a/src/hydrogen-representation-changes.cc b/src/hydrogen-representation-changes.cc
index bfc8271a9b694762bc6bd18407c56bc02d9385db..33adf5aa9aa2bd74201a95474cf147f0e59fc296 100644
--- a/src/hydrogen-representation-changes.cc
+++ b/src/hydrogen-representation-changes.cc
@@ -29,7 +29,7 @@ void HRepresentationChangesPhase::InsertRepresentationChangeForUse(
     // Try to create a new copy of the constant with the new representation.
     if (is_truncating_to_int && to.IsInteger32()) {
       Maybe<HConstant*> res = constant->CopyToTruncatedInt32(graph()->zone());
-      if (res.has_value) new_value = res.value;
+      if (res.IsJust()) new_value = res.FromJust();
     } else {
       new_value = constant->CopyToRepresentation(to, graph()->zone());
     }