[turbofan] Add initial support for growing stores.

src/compiler/load-elimination.h

Index: src/compiler/load-elimination.h
diff --git a/src/compiler/load-elimination.h b/src/compiler/load-elimination.h
index 9ab60c8a4a9d73417dc7c9045d6b6144764c2724..2a4ee405003913ae809029d8ddabc029db16ca1f 100644
--- a/src/compiler/load-elimination.h
+++ b/src/compiler/load-elimination.h
@@ -152,6 +152,7 @@ class LoadElimination final : public AdvancedReducer {
 
   Reduction ReduceCheckMaps(Node* node);
   Reduction ReduceEnsureWritableFastElements(Node* node);
+  Reduction ReduceMaybeGrowFastElements(Node* node);
   Reduction ReduceTransitionElementsKind(Node* node);
   Reduction ReduceLoadField(Node* node);
   Reduction ReduceStoreField(Node* node);