[runtime] Force internalize names used before lookup in in DescriptorArray and TransitionArray

src/objects.h

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_OBJECTS_H_
 #define V8_OBJECTS_H_
 
 #include <iosfwd>
 
 #include "src/allocation.h"
@@ skipping 8554 matching lines @@
   // Equality operations.
   inline bool Equals(Name* other);
   inline static bool Equals(Handle<Name> one, Handle<Name> two);
 
   // Conversion.
   inline bool AsArrayIndex(uint32_t* index);
 
   // If the name is private, it can only name own properties.
   inline bool IsPrivate();
 
-  // If the name is a non-flat string, this method returns a flat version of the
-  // string. Otherwise it'll just return the input.
-  static inline Handle<Name> Flatten(Handle<Name> name,
-                                     PretenureFlag pretenure = NOT_TENURED);
+  inline bool IsUniqueName() const;
 
   // Return a string version of this name that is converted according to the
   // rules described in ES6 section 9.2.11.
   MUST_USE_RESULT static MaybeHandle<String> ToFunctionName(Handle<Name> name);
 
   DECLARE_CAST(Name)
 
   DECLARE_PRINTER(Name)
 #if TRACE_MAPS
   void NameShortPrint();
@@ skipping 2248 matching lines @@
     }
     return value;
   }
 };
 
 
 }  // NOLINT, false-positive due to second-order macros.
 }  // NOLINT, false-positive due to second-order macros.
 
 #endif  // V8_OBJECTS_H_