[builtins] FastNewClosureStub becomes a builtin.

src/full-codegen/full-codegen.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/full-codegen/full-codegen.h"
 
 #include "src/ast/ast-numbering.h"
 #include "src/ast/ast.h"
 #include "src/ast/prettyprinter.h"
 #include "src/ast/scopes.h"
@@ skipping 1012 matching lines @@
 }
 
 void FullCodeGenerator::EmitNewClosure(Handle<SharedFunctionInfo> info,
                                        bool pretenure) {
   // If we're running with the --always-opt or the --prepare-always-opt
   // flag, we need to use the runtime function so that the new function
   // we are creating here gets a chance to have its code optimized and
   // doesn't just get a copy of the existing unoptimized code.
   if (!FLAG_always_opt && !FLAG_prepare_always_opt && !pretenure &&
       scope()->is_function_scope()) {
-    FastNewClosureStub stub(isolate());
-    __ Move(stub.GetCallInterfaceDescriptor().GetRegisterParameter(0), info);
-    __ CallStub(&stub);
+    Callable callable = CodeFactory::FastNewClosure(isolate());
+    __ Move(callable.descriptor().GetRegisterParameter(0), info);
+    __ Call(callable.code(), RelocInfo::CODE_TARGET);
   } else {
     __ Push(info);
     __ CallRuntime(pretenure ? Runtime::kNewClosure_Tenured
                              : Runtime::kNewClosure);
   }
   context()->Plug(result_register());
 }
 
 void FullCodeGenerator::EmitNamedPropertyLoad(Property* prop) {
   SetExpressionPosition(prop);
@@ skipping 562 matching lines @@
   return info_->has_simple_parameters();
 }
 
 FunctionLiteral* FullCodeGenerator::literal() const { return info_->literal(); }
 
 #undef __
 
 
 }  // namespace internal
 }  // namespace v8