Remove parent_level field of function type parameters.

runtime/lib/function.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/bootstrap_natives.h"
 
 #include "vm/compiler.h"
 #include "vm/dart_entry.h"
 #include "vm/exceptions.h"
 #include "vm/native_entry.h"
@@ skipping 58 matching lines @@
   const Closure& receiver =
       Closure::CheckedHandle(zone, arguments->NativeArgAt(0));
   const Function& func = Function::Handle(receiver.function());
   return func.GetClosureHashCode();
 }
 
 
 DEFINE_NATIVE_ENTRY(Closure_clone, 1) {
   const Closure& receiver =
       Closure::CheckedHandle(zone, arguments->NativeArgAt(0));
-  const TypeArguments& instantiator =
-      TypeArguments::Handle(zone, receiver.instantiator());
-  const Function& func = Function::Handle(zone, receiver.function());
-  const Context& ctx = Context::Handle(zone, receiver.context());
-  Context& cloned_ctx =
-      Context::Handle(zone, Context::New(ctx.num_variables()));
-  cloned_ctx.set_parent(Context::Handle(zone, ctx.parent()));
-  Object& inst = Object::Handle(zone);
-  for (int i = 0; i < ctx.num_variables(); i++) {
-    inst = ctx.At(i);
-    cloned_ctx.SetAt(i, inst);
+  const TypeArguments& instantiator_type_arguments =
+      TypeArguments::Handle(zone, receiver.instantiator_type_arguments());
+  const TypeArguments& function_type_arguments =
+      TypeArguments::Handle(zone, receiver.function_type_arguments());
+  const Function& function = Function::Handle(zone, receiver.function());
+  const Context& context = Context::Handle(zone, receiver.context());
+  Context& cloned_context =
+      Context::Handle(zone, Context::New(context.num_variables()));
+  cloned_context.set_parent(Context::Handle(zone, context.parent()));
+  Object& instance = Object::Handle(zone);
+  for (int i = 0; i < context.num_variables(); i++) {
+    instance = context.At(i);
+    cloned_context.SetAt(i, instance);
   }
-  return Closure::New(instantiator, func, cloned_ctx);
+  return Closure::New(instantiator_type_arguments, function_type_arguments,
+                      function, cloned_context);
 }
 
 
 }  // namespace dart