Remove signature classes from the VM.

runtime/vm/cha_test.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 "platform/assert.h"
 #include "vm/cha.h"
 #include "vm/class_finalizer.h"
 #include "vm/globals.h"
 #include "vm/symbols.h"
 #include "vm/unit_test.h"
@@ skipping 80 matching lines @@
   EXPECT(!CHA::HasSubclasses(class_c));
   cha.AddToLeafClasses(class_c);
   EXPECT(!CHA::HasSubclasses(class_d));
   cha.AddToLeafClasses(class_d);
 
   EXPECT(!ContainsCid(cha.leaf_classes(), class_a.id()));
   EXPECT(!ContainsCid(cha.leaf_classes(), class_b.id()));
   EXPECT(ContainsCid(cha.leaf_classes(), class_c.id()));
   EXPECT(ContainsCid(cha.leaf_classes(), class_d.id()));
 
-  const Class& function_impl_class =
-      Class::Handle(Type::Handle(Isolate::Current()->object_store()->
-          function_impl_type()).type_class());
-  EXPECT(cha.HasSubclasses(function_impl_class.id()));
+  const Class& closure_class =
+      Class::Handle(Isolate::Current()->object_store()->closure_class());
+  EXPECT(!cha.HasSubclasses(closure_class.id()));
 }
 
 }  // namespace dart