[builtins] FastNewClosureStub becomes a builtin.

src/crankshaft/hydrogen.cc

 // Copyright 2013 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/crankshaft/hydrogen.h"
 
 #include <memory>
 #include <sstream>
 
 #include "src/allocation-site-scopes.h"
@@ skipping 5034 matching lines @@
   DCHECK(current_block()->HasPredecessor());
   Handle<SharedFunctionInfo> shared_info = Compiler::GetSharedFunctionInfo(
       expr, current_info()->script(), top_info());
   // We also have a stack overflow if the recursive compilation did.
   if (HasStackOverflow()) return;
   // Use the fast case closure allocation code that allocates in new
   // space for nested functions that don't need pretenuring.
   HConstant* shared_info_value = Add<HConstant>(shared_info);
   HInstruction* instr;
   if (!expr->pretenure()) {
-    FastNewClosureStub stub(isolate());
-    FastNewClosureDescriptor descriptor(isolate());
+    Callable callable = CodeFactory::FastNewClosure(isolate());
     HValue* values[] = {shared_info_value};
-    HConstant* stub_value = Add<HConstant>(stub.GetCode());
-    instr = New<HCallWithDescriptor>(stub_value, 0, descriptor,
+    HConstant* stub_value = Add<HConstant>(callable.code());
+    instr = New<HCallWithDescriptor>(stub_value, 0, callable.descriptor(),
                                      ArrayVector(values));
   } else {
     Add<HPushArguments>(shared_info_value);
     Runtime::FunctionId function_id =
         expr->pretenure() ? Runtime::kNewClosure_Tenured : Runtime::kNewClosure;
     instr = New<HCallRuntime>(Runtime::FunctionForId(function_id), 1);
   }
   return ast_context()->ReturnInstruction(instr, expr->id());
 }
 
@@ skipping 7928 matching lines @@
     isolate()->GetHTracer()->TraceHydrogen(name(), graph_);
   }
 
 #ifdef DEBUG
   graph_->Verify(false);  // No full verify.
 #endif
 }
 
 }  // namespace internal
 }  // namespace v8