Fix polymorphic inlined calls with migrating prototypes

src/objects.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 6020 matching lines @@
   inline bool is_stable();
   inline void set_migration_target(bool value);
   inline bool is_migration_target();
   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. Returns NULL if no updated map is found.
-  Map* CurrentMapForDeprecated();
+  // This method also applies any pending migrations along the prototype chain.
+  static Handle<Map> CurrentMapForDeprecated(Handle<Map> map);
+  // Same as above, but does not touch the prototype chain.
+  static Handle<Map> CurrentMapForDeprecatedInternal(Handle<Map> map);
 
   static Handle<Map> RawCopy(Handle<Map> map, int instance_size);
   MUST_USE_RESULT MaybeObject* RawCopy(int instance_size);
   MUST_USE_RESULT MaybeObject* CopyWithPreallocatedFieldDescriptors();
   static Handle<Map> CopyDropDescriptors(Handle<Map> map);
   MUST_USE_RESULT MaybeObject* CopyDropDescriptors();
   static Handle<Map> CopyReplaceDescriptors(Handle<Map> map,
                                             Handle<DescriptorArray> descriptors,
                                             TransitionFlag flag,
                                             Handle<Name> name);
@@ skipping 4554 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_