Fix lost store side effects with escape analysis.

src/hydrogen-instructions.h

Index: src/hydrogen-instructions.h
diff --git a/src/hydrogen-instructions.h b/src/hydrogen-instructions.h
index 8668793c8a3e4844783ca40d1ad1a1cc054f6829..9139101999fabc6432402b7d8761b8a2eee9d203 100644
--- a/src/hydrogen-instructions.h
+++ b/src/hydrogen-instructions.h
@@ -3224,6 +3224,12 @@ class HCapturedObject V8_FINAL : public HDematerializedObject {
   int length() const { return values_.length(); }
   int capture_id() const { return capture_id_; }
 
+  void ReuseSideEffectsFromStore(HInstruction* store) {
+    ASSERT(store->HasObservableSideEffects());
+    ASSERT(store->IsStoreNamedField());
+    gvn_flags_.Add(store->gvn_flags());
+  }
+
   // Replay effects of this instruction on the given environment.
   void ReplayEnvironment(HEnvironment* env);