[stubs] Don't pass name to Load/StoreGlobalViaContext stubs.

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index 342a00e1edb8caeee89eb74d2a5cbf14579cf3b0..9d3a0620f5de3976e01ff58c6829ac04a037d07d 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -3992,6 +3992,9 @@ class ScopeInfo : public FixedArray {
                               InitializationFlag* init_flag,
                               MaybeAssignedFlag* maybe_assigned_flag);
 
+  // Lookup the name of a certain context slot by its index.
+  String* ContextSlotName(int slot_index);
+
   // Lookup support for serialized scope info. Returns the
   // parameter index for a given parameter name if the parameter is present;
   // otherwise returns a value < 0. The name must be an internalized string.