Update deprecated maps before generating optimized code.

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index 4b5b51d9d90e2363c3542c877a5489f8ddb7203d..67489512475c6c9d7a798d4f21df68859cb0c8a2 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -5344,6 +5344,12 @@ class Map: public HeapObject {
   inline void deprecate();
   inline bool is_deprecated();
   inline bool CanBeDeprecated();
+  // Returns a non-deprecated version of the input. If the input was not
+  // deprecated, it is directly returned. Otherwise, the non-deprecated version
+  // is found by re-transitioning from the root of the transition tree using the
+  // descriptor array of the map. New maps (and transitions) may be created if
+  // no new (more general) version exists.
+  static inline Handle<Map> CurrentMapForDeprecated(Handle<Map> map);
 
   MUST_USE_RESULT MaybeObject* RawCopy(int instance_size);
   MUST_USE_RESULT MaybeObject* CopyWithPreallocatedFieldDescriptors();