Pretenure ASCII cons string in high promotion mode.

src/serialize.cc

Index: src/serialize.cc
diff --git a/src/serialize.cc b/src/serialize.cc
index d4f31c1e1a821c1a815c6047b7b2e0cbc077e7e1..3e70edc59e73818892a1de1600a8f5eb73606ab6 100644
--- a/src/serialize.cc
+++ b/src/serialize.cc
@@ -558,6 +558,11 @@ void ExternalReferenceTable::PopulateTable(Isolate* isolate) {
       UNCLASSIFIED,
       58,
       "Runtime::AllocateInOldPointerSpace");
+  Add(ExternalReference::new_space_high_promotion_mode_active_address(isolate).
+      address(),
+      UNCLASSIFIED,
+      59,
+      "Heap::NewSpaceAllocationLimitAddress");
 
   // Add a small set of deopt entry addresses to encoder without generating the
   // deopt table code, which isn't possible at deserialization time.
@@ -568,7 +573,7 @@ void ExternalReferenceTable::PopulateTable(Isolate* isolate) {
         entry,
         Deoptimizer::LAZY,
         Deoptimizer::CALCULATE_ENTRY_ADDRESS);
-    Add(address, LAZY_DEOPTIMIZATION, 59 + entry, "lazy_deopt");
+    Add(address, LAZY_DEOPTIMIZATION, 60 + entry, "lazy_deopt");
   }
 }