Handle creating ParameterMirrors for the parameters of forwarding constructors.

runtime/vm/class_finalizer.cc

Index: runtime/vm/class_finalizer.cc
diff --git a/runtime/vm/class_finalizer.cc b/runtime/vm/class_finalizer.cc
index c49794a57e510fd78c1c49814da310e8a9adc925..ee618f25f0f7e735294ed53d5cbcf0d55768dfa0 100644
--- a/runtime/vm/class_finalizer.cc
+++ b/runtime/vm/class_finalizer.cc
@@ -491,7 +491,7 @@ void ClassFinalizer::ResolveType(const Class& cls, const AbstractType& type) {
 void ClassFinalizer::FinalizeTypeParameters(
     const Class& cls,
     GrowableObjectArray* pending_types) {
-  if (cls.IsMixinApplication()) {
+  if (cls.IsAnonymousMixinApplication()) {
     // Setup the type parameters of the mixin application and finalize the
     // mixin type.
     ApplyMixinType(cls, pending_types);
@@ -1708,7 +1708,7 @@ void ClassFinalizer::ApplyMixinAppAlias(const Class& mixin_app_class,
   // to the super class.
   Class& super_class = Class::Handle(isolate, super_type.type_class());
   ASSERT(mixin_app_class.SuperClass() == super_class.raw());
-  while (super_class.IsMixinApplication()) {
+  while (super_class.IsAnonymousMixinApplication()) {
     super_class = super_class.SuperClass();
   }
   const intptr_t num_super_type_params = super_class.NumTypeParameters();
@@ -1945,6 +1945,7 @@ void ClassFinalizer::CreateForwardingConstructors(
       for (intptr_t n = 0; n < num_parameters; n++) {
         clone.SetParameterTypeAt(n, dynamic_type);
       }
+      clone.SetForwardingTarget(func);
       cloned_funcs.Add(clone);
     }
   }
@@ -2168,7 +2169,7 @@ void ClassFinalizer::FinalizeClass(const Class& cls) {
   if (FLAG_trace_class_finalization) {
     OS::Print("Finalize %s\n", cls.ToCString());
   }
-  if (cls.IsMixinApplication()) {
+  if (cls.IsAnonymousMixinApplication()) {
     // Copy instance methods and fields from the mixin class.
     // This has to happen before the check whether the methods of
     // the class conflict with inherited methods.
@@ -2327,7 +2328,7 @@ bool ClassFinalizer::IsMixinCycleFree(const Class& cls,
   visited->Add(cls.id());
   Class& super_class = Class::Handle(cls.raw());
   do {
-    if (super_class.IsMixinApplication()) {
+    if (super_class.IsAnonymousMixinApplication()) {
       const Type& mixin_type = Type::Handle(super_class.mixin());
       ASSERT(!mixin_type.IsNull());
       ASSERT(mixin_type.HasResolvedTypeClass());