Fix shared function info code replacement.

src/objects.cc

Index: src/objects.cc
diff --git a/src/objects.cc b/src/objects.cc
index 733a1f8208d63d8777fad4bcb4489e3f0e021f1a..c7d29ee7e009fdbda39da8402ebb8dd26b28355b 100644
--- a/src/objects.cc
+++ b/src/objects.cc
@@ -8292,7 +8292,7 @@ void SharedFunctionInfo::EnableDeoptimizationSupport(Code* recompiled) {
     // old code, we have to replace it. We should try to avoid this
     // altogether because it flushes valuable type feedback by
     // effectively resetting all IC state.
-    set_code(recompiled);
+    ReplaceCode(recompiled);
   }
   ASSERT(has_deoptimization_support());
 }