Foundation for the use of informative definitions in Crankshaft.

src/hydrogen.h

Index: src/hydrogen.h
diff --git a/src/hydrogen.h b/src/hydrogen.h
index 4d66aef875874db327f3eaca0c0096d9f3824718..7417fdd2de495e92ed9b40e3b37f1cb3bba3bf4a 100644
--- a/src/hydrogen.h
+++ b/src/hydrogen.h
@@ -273,6 +273,7 @@ class HGraph: public ZoneObject {
   void EliminateRedundantBoundsChecks();
   void DehoistSimpleArrayIndexComputations();
   void DeadCodeElimination();
+  void RestoreActualValues();
   void PropagateDeoptimizingMark();
   void EliminateUnusedInstructions();
 
@@ -897,7 +898,8 @@ class HGraphBuilder {
       HCheckMaps* mapcheck,
       bool is_js_array,
       ElementsKind elements_kind,
-      bool is_store);
+      bool is_store,
+      Representation checked_index_representation = Representation::None());
 
  private:
   HGraphBuilder();