[stubs] Port NumberToString stub to TF

src/code-stub-assembler.h

 // Copyright 2016 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_CODE_STUB_ASSEMBLER_H_
 #define V8_CODE_STUB_ASSEMBLER_H_
 
 #include <functional>
 
 #include "src/compiler/code-assembler.h"
@@ skipping 503 matching lines @@
   compiler::Node* SubString(compiler::Node* context, compiler::Node* string,
                             compiler::Node* from, compiler::Node* to);
 
   compiler::Node* StringFromCodePoint(compiler::Node* codepoint,
                                       UnicodeEncoding encoding);
 
   // Type conversion helpers.
   // Convert a String to a Number.
   compiler::Node* StringToNumber(compiler::Node* context,
                                  compiler::Node* input);
+  compiler::Node* NumberToString(compiler::Node* context,
+                                 compiler::Node* input);
   // Convert an object to a name.
   compiler::Node* ToName(compiler::Node* context, compiler::Node* input);
   // Convert a Non-Number object to a Number.
   compiler::Node* NonNumberToNumber(compiler::Node* context,
                                     compiler::Node* input);
   // Convert any object to a Number.
   compiler::Node* ToNumber(compiler::Node* context, compiler::Node* input);
 
   enum ToIntegerTruncationMode {
     kNoTruncation,
@@ skipping 420 matching lines @@
                                            Label* bailout);
 
   static const int kElementLoopUnrollThreshold = 8;
 };
 
 DEFINE_OPERATORS_FOR_FLAGS(CodeStubAssembler::AllocationFlags);
 
 }  // namespace internal
 }  // namespace v8
 #endif  // V8_CODE_STUB_ASSEMBLER_H_