[turbofan] Add initial support for growing stores.

src/compiler/js-graph.h

Index: src/compiler/js-graph.h
diff --git a/src/compiler/js-graph.h b/src/compiler/js-graph.h
index f515389d7fbb45cb1521dcb632384fc091a6d7bf..f42284f23a6646b44a312ffd064083517067bc81 100644
--- a/src/compiler/js-graph.h
+++ b/src/compiler/js-graph.h
@@ -47,6 +47,7 @@ class JSGraph : public ZoneObject {
   Node* EmptyLiteralsArrayConstant();
   Node* EmptyStringConstant();
   Node* FixedArrayMapConstant();
+  Node* FixedDoubleArrayMapConstant();
   Node* HeapNumberMapConstant();
   Node* OptimizedOutConstant();
   Node* StaleRegisterConstant();
@@ -158,6 +159,7 @@ class JSGraph : public ZoneObject {
     kEmptyLiteralsArrayConstant,
     kEmptyStringConstant,
     kFixedArrayMapConstant,
+    kFixedDoubleArrayMapConstant,
     kHeapNumberMapConstant,
     kOptimizedOutConstant,
     kStaleRegisterConstant,