Allocate instance closures similarly to regular closures, i.e. without a

runtime/vm/flow_graph_optimizer.cc

 // Copyright (c) 2013, 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/flow_graph_optimizer.h"
 
 #include "vm/bit_vector.h"
 #include "vm/cha.h"
 #include "vm/cpu.h"
 #include "vm/dart_entry.h"
@@ skipping 7229 matching lines @@
     SetValue(instr, non_constant_);
   }
 }
 
 
 void ConstantPropagator::VisitCreateArray(CreateArrayInstr* instr) {
   SetValue(instr, non_constant_);
 }
 
 
-void ConstantPropagator::VisitCreateClosure(CreateClosureInstr* instr) {
-  // TODO(kmillikin): Treat closures as constants.
-  SetValue(instr, non_constant_);
-}
-
-
 void ConstantPropagator::VisitAllocateObject(AllocateObjectInstr* instr) {
   SetValue(instr, non_constant_);
 }
 
 
 void ConstantPropagator::VisitLoadUntagged(LoadUntaggedInstr* instr) {
   SetValue(instr, non_constant_);
 }
 
 
@@ skipping 1356 matching lines @@
   }
 
   // Insert materializations at environment uses.
   for (intptr_t i = 0; i < exits.length(); i++) {
     CreateMaterializationAt(exits[i], alloc, alloc->cls(), *fields);
   }
 }
 
 
 }  // namespace dart