[turbofan] Generalize AllocateStub to allow old space allocation.

src/code-factory.cc

Index: src/code-factory.cc
diff --git a/src/code-factory.cc b/src/code-factory.cc
index 9a907ffffc32f4eb2041466006e1a2665cdb7f4c..6166fb3377860bf456cb509e33f8c7072a3faf3f 100644
--- a/src/code-factory.cc
+++ b/src/code-factory.cc
@@ -480,12 +480,11 @@ SIMD128_TYPES(SIMD128_ALLOC)
 #undef SIMD128_ALLOC
 
 // static
-Callable CodeFactory::AllocateInNewSpace(Isolate* isolate) {
-  AllocateInNewSpaceStub stub(isolate);
+Callable CodeFactory::Allocate(Isolate* isolate, PretenureFlag pretenure_flag) {
+  AllocateStub stub(isolate, pretenure_flag);
   return Callable(stub.GetCode(), stub.GetCallInterfaceDescriptor());
 }
 
-
 // static
 Callable CodeFactory::ArgumentAdaptor(Isolate* isolate) {
   return Callable(isolate->builtins()->ArgumentsAdaptorTrampoline(),