Deopt maybe tenure allocation sites when semi-space is maximum size.

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index 787e7ea87123b25fbf7fa74337c1ac4109eda209..ca8038f8938481046aaa4f2f0cb9eeaf9ac6c561 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -8503,6 +8503,10 @@ class AllocationSite: public Struct {
     return pretenure_decision() == kZombie;
   }
 
+  bool IsMaybeTenure() {
+    return pretenure_decision() == kMaybeTenure;
+  }
+
   inline void MarkZombie();
 
   inline bool MakePretenureDecision(PretenureDecision current_decision,