[stubs] Port NumberToString stub to TF

src/code-stubs-hydrogen.cc

 // 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.
 
 #include "src/code-stubs.h"
 
 #include <memory>
 
 #include "src/bailout-reason.h"
 #include "src/code-factory.h"
@@ skipping 310 matching lines @@
   Handle<Code> code = chunk->Codegen();
   if (FLAG_profile_hydrogen_code_stub_compilation) {
     OFStream os(stdout);
     os << "[Lazy compilation of " << stub << " took "
        << timer.Elapsed().InMillisecondsF() << " ms]" << std::endl;
   }
   return code;
 }
 
 
-template <>
-HValue* CodeStubGraphBuilder<NumberToStringStub>::BuildCodeStub() {
-  info()->MarkAsSavesCallerDoubles();
-  HValue* number = GetParameter(Descriptor::kArgument);
-  return BuildNumberToString(number, AstType::Number());
-}
-
-
-Handle<Code> NumberToStringStub::GenerateCode() {
-  return DoGenerateCode(this);
-}
-
 HValue* CodeStubGraphBuilderBase::BuildPushElement(HValue* object, HValue* argc,
                                                    HValue* argument_elements,
                                                    ElementsKind kind) {
   // Precheck whether all elements fit into the array.
   if (!IsFastObjectElementsKind(kind)) {
     LoopBuilder builder(this, context(), LoopBuilder::kPostIncrement);
     HValue* start = graph()->GetConstant0();
     HValue* key = builder.BeginBody(start, argc, Token::LT);
     {
       HInstruction* argument =
@@ skipping 1106 matching lines @@
   return Pop();
 }
 
 
 Handle<Code> KeyedLoadGenericStub::GenerateCode() {
   return DoGenerateCode(this);
 }
 
 }  // namespace internal
 }  // namespace v8