Update deprecated maps before generating optimized code.

src/ast.h

 // 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 259 matching lines @@
   SmallMapList() {}
   SmallMapList(int capacity, Zone* zone) : list_(capacity, zone) {}
 
   void Reserve(int capacity, Zone* zone) { list_.Reserve(capacity, zone); }
   void Clear() { list_.Clear(); }
   void Sort() { list_.Sort(); }
 
   bool is_empty() const { return list_.is_empty(); }
   int length() const { return list_.length(); }
 
+  void AddMapIfMissing(Handle<Map> map, Zone* zone) {
+    map = Map::CurrentMapForDeprecated(map);
+    for (int i = 0; i < length(); ++i) {
+      if (at(i).is_identical_to(map)) return;
+    }
+    Add(map, zone);
+  }
+
   void Add(Handle<Map> handle, Zone* zone) {
     list_.Add(handle.location(), zone);
   }
 
   Handle<Map> at(int i) const {
     return Handle<Map>(list_.at(i));
   }
 
   Handle<Map> first() const { return at(0); }
   Handle<Map> last() const { return at(length() - 1); }
@@ skipping 2748 matching lines @@
  private:
   Isolate* isolate_;
   Zone* zone_;
   Visitor visitor_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_AST_H_