[runtime] Introduce FastNewStrictArgumentsStub to optimize strict arguments.

src/code-factory.cc

Index: src/code-factory.cc
diff --git a/src/code-factory.cc b/src/code-factory.cc
index 3befe1aeec11f3f2f64fbddf8ea6aeafa490a09c..fb719a393069d5c9e3c1d542db4e20acd5ca14d2 100644
--- a/src/code-factory.cc
+++ b/src/code-factory.cc
@@ -287,11 +287,17 @@ Callable CodeFactory::FastNewRestParameter(Isolate* isolate) {
 
 
 // static
+Callable CodeFactory::FastNewStrictArguments(Isolate* isolate) {
+  FastNewStrictArgumentsStub stub(isolate);
+  return Callable(stub.GetCode(), stub.GetCallInterfaceDescriptor());
+}
+
+
+// static
 Callable CodeFactory::ArgumentsAccess(Isolate* isolate,
-                                      bool is_unmapped_arguments,
                                       bool has_duplicate_parameters) {
-  ArgumentsAccessStub::Type type = ArgumentsAccessStub::ComputeType(
-      is_unmapped_arguments, has_duplicate_parameters);
+  ArgumentsAccessStub::Type type =
+      ArgumentsAccessStub::ComputeType(has_duplicate_parameters);
   ArgumentsAccessStub stub(isolate, type);
   return Callable(stub.GetCode(), stub.GetCallInterfaceDescriptor());
 }