Fix build

src/virtual-frame.h

 // Copyright 2008 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 147 matching lines @@
   FrameElement(Type type, Register reg, SyncFlag is_synced) {
     Initialize(type, reg, is_synced);
   }
 
   // Used to construct constant elements.
   inline FrameElement(Handle<Object> value, SyncFlag is_synced);
 
   // Used to initialize invalid, memory, and register elements.
   inline void Initialize(Type type, Register reg, SyncFlag is_synced);
 
+  void set_index(int new_index) {
+    ASSERT(is_copy());
+    data_.index_ = new_index;
+  }
+
   friend class VirtualFrame;
 };
 
 
 } }  // namespace v8::internal
 
 #ifdef ARM
 #include "virtual-frame-arm.h"
 #else  // ia32
 #include "virtual-frame-ia32.h"
@@ skipping 14 matching lines @@
   type_ = TypeField::encode(type)
           | IsCopiedField::encode(false)
           | SyncField::encode(is_synced);
   data_.reg_ = reg;
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_VIRTUAL_FRAME_H_