X64: Make lazy arguments objects work

src/x64/codegen-x64.h

 // Copyright 2009 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 405 matching lines @@
   void LoadGlobalReceiver();
 
   // Generate code to push the value of an expression on top of the frame
   // and then spill the frame fully to memory.  This function is used
   // temporarily while the code generator is being transformed.
   void LoadAndSpill(Expression* expression,
                     TypeofState typeof_state = NOT_INSIDE_TYPEOF);
 
   // Read a value from a slot and leave it on top of the expression stack.
   void LoadFromSlot(Slot* slot, TypeofState typeof_state);
+  void LoadFromSlotCheckForArguments(Slot* slot, TypeofState state);
   Result LoadFromGlobalSlotCheckExtensions(Slot* slot,
                                            TypeofState typeof_state,
                                            JumpTarget* slow);
 
   // Store the value on top of the expression stack into a slot, leaving the
   // value in place.
   void StoreToSlot(Slot* slot, InitState init_state);
 
   // Special code for typeof expressions: Unfortunately, we must
   // be careful when loading the expression in 'typeof'
@@ skipping 208 matching lines @@
   friend class Reference;
   friend class Result;
 
   DISALLOW_COPY_AND_ASSIGN(CodeGenerator);
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_X64_CODEGEN_X64_H_