Share optimized code for closures.

src/hydrogen.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 1138 matching lines @@
                                      bool smi_and_map_check);
   HInstruction* BuildStoreNamedGeneric(HValue* object,
                                        Handle<String> name,
                                        HValue* value);
   HInstruction* BuildStoreKeyedGeneric(HValue* object,
                                        HValue* key,
                                        HValue* value);
 
   HValue* BuildContextChainWalk(Variable* var);
 
+  HInstruction* BuildThisFunction();
+
   void AddCheckConstantFunction(Call* expr,
                                 HValue* receiver,
                                 Handle<Map> receiver_map,
                                 bool smi_and_map_check);
 
   Zone* zone() const { return zone_; }
 
   // The translation state of the currently-being-translated function.
   FunctionState* function_state_;
 
@@ skipping 262 matching lines @@
   const char* filename_;
   HeapStringAllocator string_allocator_;
   StringStream trace_;
   int indent_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_HYDROGEN_H_