| Index: src/hydrogen-instructions.h | 
| diff --git a/src/hydrogen-instructions.h b/src/hydrogen-instructions.h | 
| index c68befd15ae14b72ad439899d17e310e0cdc1f89..0f6cb6e473d7454dd9cb1709f3b2faef1f1feaf3 100644 | 
| --- a/src/hydrogen-instructions.h | 
| +++ b/src/hydrogen-instructions.h | 
| @@ -4198,6 +4198,10 @@ class HStoreNamedField: public HTemplateInstruction<2> { | 
| ReceiverObjectNeedsWriteBarrier(object(), new_space_dominator()); | 
| } | 
|  | 
| +  bool NeedsWriteBarrierForMap() { | 
| +    return ReceiverObjectNeedsWriteBarrier(object(), new_space_dominator()); | 
| +  } | 
| + | 
| private: | 
| Handle<String> name_; | 
| bool is_in_object_; | 
|  |