Clean up and update const / var

src/objects.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #include "src/accessors.h"
 #include "src/allocation-site-scopes.h"
 #include "src/api.h"
 #include "src/arguments.h"
@@ skipping 2332 matching lines @@
     FieldDescriptor d(handle(descriptors->GetKey(modify_index), isolate),
                       new_map->NumberOfFields(),
                       attributes,
                       Representation::Tagged());
     descriptors->Replace(modify_index, &d);
     int unused_property_fields = new_map->unused_property_fields() - 1;
     if (unused_property_fields < 0) {
       unused_property_fields += JSObject::kFieldsAdded;
     }
     new_map->set_unused_property_fields(unused_property_fields);
+  } else if (details.attributes() != attributes) {
+    FieldDescriptor d(handle(descriptors->GetKey(modify_index), isolate),
+                      details.field_index(), attributes,
+                      Representation::Tagged());
+    descriptors->Replace(modify_index, &d);
   }
 
   if (FLAG_trace_generalization) {
     HeapType* field_type = (details.type() == FIELD)
         ? map->instance_descriptors()->GetFieldType(modify_index)
         : NULL;
     map->PrintGeneralization(stdout, reason, modify_index,
                         new_map->NumberOfOwnDescriptors(),
                         new_map->NumberOfOwnDescriptors(),
                         details.type() == CONSTANT && store_mode == FORCE_FIELD,
@@ skipping 14632 matching lines @@
 #define ERROR_MESSAGES_TEXTS(C, T) T,
   static const char* error_messages_[] = {
       ERROR_MESSAGES_LIST(ERROR_MESSAGES_TEXTS)
   };
 #undef ERROR_MESSAGES_TEXTS
   return error_messages_[reason];
 }
 
 
 } }  // namespace v8::internal