Use stability to only conditionally flush information from the CheckMaps table.

src/hydrogen-instructions.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 3087 matching lines @@
 }
 
 
 HCheckMaps* HCheckMaps::New(Zone* zone,
                             HValue* context,
                             HValue* value,
                             Handle<Map> map,
                             CompilationInfo* info,
                             HValue* typecheck) {
   HCheckMaps* check_map = new(zone) HCheckMaps(value, zone, typecheck);
-  check_map->Add(map, zone);
+  check_map->Add(map, info, zone);
   if (map->CanOmitMapChecks() &&
       value->IsConstant() &&
       HConstant::cast(value)->HasMap(map)) {
     // TODO(titzer): collect dependent map checks into a list.
     check_map->omit_ = true;
     if (map->CanTransition()) {
       map->AddDependentCompilationInfo(
           DependentCode::kPrototypeCheckGroup, info);
     }
   }
@@ skipping 1373 matching lines @@
       break;
     case kExternalMemory:
       stream->Add("[external-memory]");
       break;
   }
 
   stream->Add("@%d", offset());
 }
 
 } }  // namespace v8::internal