Rename Closure instance field type_arguments_ to instantiator_.

runtime/vm/parser.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/parser.h"
 #include "vm/flags.h"
 
 #ifndef DART_PRECOMPILED_RUNTIME
 
 #include "lib/invocation_mirror.h"
@@ skipping 4689 matching lines @@
     }
     cls ^= obj.raw();
     if (is_patch) {
       // Preserve and reuse the original type parameters and bounds since the
       // ones defined in the patch class will not be finalized.
       orig_type_parameters = cls.type_parameters();
       cls = Class::New(library_, class_name, script_, declaration_pos);
     } else {
       // Not patching a class, but it has been found. This must be one of the
       // pre-registered classes from object.cc or a duplicate definition.
-      if (!(cls.is_prefinalized() ||
+      if (!(cls.is_prefinalized() || cls.IsClosureClass() ||
             RawObject::IsImplicitFieldClassId(cls.id()))) {
         ReportError(classname_pos, "class '%s' is already defined",
                     class_name.ToCString());
       }
       // Pre-registered classes need their scripts connected at this time.
       cls.set_script(script_);
       cls.set_token_pos(declaration_pos);
     }
   }
   ASSERT(!cls.IsNull());
@@ skipping 10353 matching lines @@
     const ArgumentListNode& function_args,
     const LocalVariable* temp_for_last_arg,
     bool is_super_invocation) {
   UNREACHABLE();
   return NULL;
 }
 
 }  // namespace dart
 
 #endif  // DART_PRECOMPILED_RUNTIME