Allow embedding of ConsString objects into code.

src/factory.h

 // Copyright 2014 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_FACTORY_H_
 #define V8_FACTORY_H_
 
 #include "src/isolate.h"
 
 namespace v8 {
@@ skipping 179 matching lines @@
       PretenureFlag pretenure = NOT_TENURED);
 
   // Creates a single character string where the character has given code.
   // A cache is used for ASCII codes.
   Handle<String> LookupSingleCharacterStringFromCode(uint32_t code);
 
   // Create a new cons string object which consists of a pair of strings.
   MUST_USE_RESULT MaybeHandle<String> NewConsString(Handle<String> left,
                                                     Handle<String> right);
 
-  // Create a new sequential string containing the concatenation of the inputs.
-  Handle<String> NewFlatConcatString(Handle<String> first,
-                                     Handle<String> second);
-
   // Create a new string object which holds a proper substring of a string.
   Handle<String> NewProperSubString(Handle<String> str,
                                     int begin,
                                     int end);
 
   // Create a new string object which holds a substring of a string.
   Handle<String> NewSubString(Handle<String> str, int begin, int end) {
     if (begin == 0 && end == str->length()) return str;
     return NewProperSubString(str, begin, end);
   }
@@ skipping 496 matching lines @@
                                  PretenureFlag pretenure = TENURED);
 
   Handle<JSFunction> NewFunction(Handle<Map> map,
                                  Handle<String> name,
                                  MaybeHandle<Code> maybe_code);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_FACTORY_H_