Store transitioned JSArray maps in global context

src/accessors.cc

Index: src/accessors.cc
diff --git a/src/accessors.cc b/src/accessors.cc
index e60f568a278908fbfe7af23e84de4736af147068..54e037c723a2eac9a98e4b0efeba1725d6a7aa97 100644
--- a/src/accessors.cc
+++ b/src/accessors.cc
@@ -1,4 +1,4 @@
-// Copyright 2011 the V8 project authors. All rights reserved.
+// 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:
@@ -486,16 +486,6 @@ MaybeObject* Accessors::FunctionSetPrototype(JSObject* object,
                                                     NONE);
   }
 
-  if (function->has_initial_map()) {
-    // If the function has allocated the initial map
-    // replace it with a copy containing the new prototype.
-    Object* new_map;
-    { MaybeObject* maybe_new_map =
-          function->initial_map()->CopyDropTransitions();
-      if (!maybe_new_map->ToObject(&new_map)) return maybe_new_map;
-    }
-    function->set_initial_map(Map::cast(new_map));
-  }
   Object* prototype;
   { MaybeObject* maybe_prototype = function->SetPrototype(value);
     if (!maybe_prototype->ToObject(&prototype)) return maybe_prototype;