Allow all Names to be fast property names

src/objects.h

 // Copyright 2012 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 "src/allocation.h"
 #include "src/assert-scope.h"
 #include "src/builtins.h"
@@ skipping 8929 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);
 
   // Casting.
   static inline Name* cast(Object* obj);
 
-  bool IsCacheable(Isolate* isolate);
-
   DECLARE_PRINTER(Name)
 
   // Layout description.
   static const int kHashFieldOffset = HeapObject::kHeaderSize;
   static const int kSize = kHashFieldOffset + kPointerSize;
 
   // Mask constant for checking if a name has a computed hash code
   // and if it is a string that is an array index.  The least significant bit
   // indicates whether a hash code has been computed.  If the hash code has
   // been computed the 2nd bit tells whether the string can be used as an
@@ skipping 2307 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_