Remove parent_level field of function type parameters.

runtime/vm/object_service.cc

 // Copyright (c) 2016, 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/debugger.h"
 #include "vm/disassembler.h"
 #include "vm/object.h"
 #include "vm/object_store.h"
 #include "vm/stub_code.h"
 #include "vm/symbols.h"
@@ skipping 1058 matching lines @@
 
   PrintSharedInstanceJSON(&jsobj, ref);
   // TODO(regis): Wouldn't it be simpler to provide a Closure::PrintJSONImpl()?
   if (IsClosure()) {
     jsobj.AddProperty("kind", "Closure");
   } else {
     jsobj.AddProperty("kind", "PlainInstance");
   }
   jsobj.AddServiceId(*this);
   if (IsClosure()) {
-    // TODO(regis): How about closureInstantiator?
+    // TODO(regis): How about closureInstantiatorTypeArguments and
+    // closureFunctionTypeArguments?
     jsobj.AddProperty("closureFunction",
                       Function::Handle(Closure::Cast(*this).function()));
     jsobj.AddProperty("closureContext",
                       Context::Handle(Closure::Cast(*this).context()));
   }
   if (ref) {
     return;
   }
   if (IsClosure()) {
     Debugger* debugger = Isolate::Current()->debugger();
@@ skipping 491 matching lines @@
   jsobj.AddProperty("mirrorReferent", referent_handle);
 }
 
 void UserTag::PrintJSONImpl(JSONStream* stream, bool ref) const {
   Instance::PrintJSONImpl(stream, ref);
 }
 
 #endif
 
 }  // namespace dart