Tiny DescriptorArray cleanup.

src/runtime.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 2076 matching lines @@
   MaybeObject* maybe_name =
       isolate->heap()->AllocateStringFromAscii(CStrVector("prototype"));
   String* name;
   if (!maybe_name->To(&name)) return maybe_name;
 
   if (function->HasFastProperties()) {
     // Construct a new field descriptor with updated attributes.
     DescriptorArray* instance_desc = function->map()->instance_descriptors();
     int index = instance_desc->Search(name);
     ASSERT(index != DescriptorArray::kNotFound);
-    PropertyDetails details(instance_desc->GetDetails(index));
+    PropertyDetails details = instance_desc->GetDetails(index);
     CallbacksDescriptor new_desc(name,
         instance_desc->GetValue(index),
         static_cast<PropertyAttributes>(details.attributes() | READ_ONLY),
         details.index());
     // Construct a new field descriptors array containing the new descriptor.
     Object* descriptors_unchecked;
     { MaybeObject* maybe_descriptors_unchecked =
         instance_desc->CopyInsert(&new_desc, REMOVE_TRANSITIONS);
       if (!maybe_descriptors_unchecked->ToObject(&descriptors_unchecked)) {
         return maybe_descriptors_unchecked;
@@ skipping 11258 matching lines @@
     // Handle last resort GC and make sure to allow future allocations
     // to grow the heap without causing GCs (if possible).
     isolate->counters()->gc_last_resort_from_js()->Increment();
     isolate->heap()->CollectAllGarbage(Heap::kNoGCFlags,
                                        "Runtime::PerformGC");
   }
 }
 
 
 } }  // namespace v8::internal