Recursion limit for one-char string replace and retire String::kMinNonFlatLength.

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 6573 matching lines @@
 
   // Maximum number of characters to consider when trying to convert a string
   // value into an array index.
   static const int kMaxArrayIndexSize = 10;
 
   // Max ASCII char code.
   static const int kMaxAsciiCharCode = unibrow::Utf8::kMaxOneByteChar;
   static const unsigned kMaxAsciiCharCodeU = unibrow::Utf8::kMaxOneByteChar;
   static const int kMaxUC16CharCode = 0xffff;
 
-  // Minimum length for a cons string.
-  static const int kMinNonFlatLength = 13;
-
   // Mask constant for checking if a string has a computed hash code
   // and if it 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
   // array index.
   static const int kHashNotComputedMask = 1;
   static const int kIsNotArrayIndexMask = 1 << 1;
   static const int kNofHashBitFields = 2;
 
   // Shift constant retrieving hash code from hash field.
@@ skipping 1584 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_