Fix missing write barrier in store field stub.

src/hydrogen-instructions.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 4180 matching lines @@
   int offset() const { return offset_; }
   Handle<Map> transition() const { return transition_; }
   void set_transition(Handle<Map> map) { transition_ = map; }
   HValue* new_space_dominator() const { return new_space_dominator_; }
 
   bool NeedsWriteBarrier() {
     return StoringValueNeedsWriteBarrier(value()) &&
         ReceiverObjectNeedsWriteBarrier(object(), new_space_dominator());
   }
 
+  bool NeedsWriteBarrierForMap() {
+    return ReceiverObjectNeedsWriteBarrier(object(), new_space_dominator());
+  }
+
  private:
   Handle<String> name_;
   bool is_in_object_;
   int offset_;
   Handle<Map> transition_;
   HValue* new_space_dominator_;
 };
 
 
 class HStoreNamedGeneric: public HTemplateInstruction<3> {
@@ skipping 842 matching lines @@
   DECLARE_CONCRETE_INSTRUCTION(LoadFieldByIndex);
 };
 
 
 #undef DECLARE_INSTRUCTION
 #undef DECLARE_CONCRETE_INSTRUCTION
 
 } }  // namespace v8::internal
 
 #endif  // V8_HYDROGEN_INSTRUCTIONS_H_