[stubs] Unify the type conversion call interface descriptors.

src/code-stubs.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 <sstream>
 
 #include "src/bootstrapper.h"
 #include "src/code-factory.h"
@@ skipping 2435 matching lines @@
 }
 
 
 void FastNewContextStub::InitializeDescriptor(CodeStubDescriptor* d) {}
 
 
 void TypeofStub::InitializeDescriptor(CodeStubDescriptor* descriptor) {}
 
 
 void NumberToStringStub::InitializeDescriptor(CodeStubDescriptor* descriptor) {
-  NumberToStringDescriptor call_descriptor(isolate());
   descriptor->Initialize(
       Runtime::FunctionForId(Runtime::kNumberToString)->entry);
 }
 
 
 void FastCloneRegExpStub::InitializeDescriptor(CodeStubDescriptor* descriptor) {
   FastCloneRegExpDescriptor call_descriptor(isolate());
   descriptor->Initialize(
       Runtime::FunctionForId(Runtime::kCreateRegExpLiteral)->entry);
 }
@@ skipping 289 matching lines @@
   if (type->Is(Type::UntaggedPointer())) {
     return Representation::External();
   }
 
   DCHECK(!type->Is(Type::Untagged()));
   return Representation::Tagged();
 }
 
 }  // namespace internal
 }  // namespace v8