Rename Closure instance field type_arguments_ to instantiator_.

runtime/lib/mirrors.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 "lib/mirrors.h"
 
 #include "lib/invocation_mirror.h"
 #include "vm/bootstrap_natives.h"
 #include "vm/class_finalizer.h"
 #include "vm/compiler.h"
@@ skipping 1449 matching lines @@
       // The VM uses separate Functions for tear-offs, but the mirrors consider
       // the tear-offs to be the same as the torn-off methods. Avoid handing out
       // a reference to the tear-off here to avoid a special case in the
       // the equality test.
       function = function.parent_function();
     }
 
     Type& instantiator = Type::Handle();
     if (closure.IsClosure()) {
       const TypeArguments& arguments =
-          TypeArguments::Handle(closure.GetTypeArguments());
+          TypeArguments::Handle(Closure::Cast(closure).instantiator());
       const Class& cls =
           Class::Handle(Isolate::Current()->object_store()->object_class());
       instantiator = Type::New(cls, arguments, TokenPosition::kNoSource);
       instantiator.SetIsFinalized();
     }
     return CreateMethodMirror(function, Instance::null_instance(),
                               instantiator);
   }
   return Instance::null();
 }
@@ skipping 607 matching lines @@
 
 DEFINE_NATIVE_ENTRY(TypeMirror_subtypeTest, 2) {
   GET_NON_NULL_NATIVE_ARGUMENT(AbstractType, a, arguments->NativeArgAt(0));
   GET_NON_NULL_NATIVE_ARGUMENT(AbstractType, b, arguments->NativeArgAt(1));
   return Bool::Get(a.IsSubtypeOf(b, NULL, NULL, Heap::kNew)).raw();
 }
 
 #endif  // !PRODUCT && !DART_PRECOMPILED_RUNTIME
 
 }  // namespace dart