Rename CurrentMapForDeprecated to TryUpdate, and introduce Map::Update which potentially deprecates

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index 8084474a9be9351c83df10d187d7dbabfd6c1aec..ec019f96817adb09c2422e9eafa8b6b64b9ccabd 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -6459,12 +6459,16 @@ class Map: public HeapObject {
   // is found by re-transitioning from the root of the transition tree using the
   // descriptor array of the map. Returns NULL if no updated map is found.
   // This method also applies any pending migrations along the prototype chain.
-  static MaybeHandle<Map> CurrentMapForDeprecated(Handle<Map> map)
-      V8_WARN_UNUSED_RESULT;
+  static MaybeHandle<Map> TryUpdate(Handle<Map> map) V8_WARN_UNUSED_RESULT;
   // Same as above, but does not touch the prototype chain.
-  static MaybeHandle<Map> CurrentMapForDeprecatedInternal(Handle<Map> map)
+  static MaybeHandle<Map> TryUpdateInternal(Handle<Map> map)
       V8_WARN_UNUSED_RESULT;
 
+  // Returns a non-deprecated version of the input. This method may deprecate
+  // existing maps along the way if encodings conflict. Not for use while
+  // gathering type feedback. Use TryUpdate in those cases instead.
+  static Handle<Map> Update(Handle<Map> map);
+
   static Handle<Map> CopyDropDescriptors(Handle<Map> map);
   static Handle<Map> CopyInsertDescriptor(Handle<Map> map,
                                           Descriptor* descriptor,