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

src/heap.h

Index: src/heap.h
diff --git a/src/heap.h b/src/heap.h
index b465ca47c485bb7223cd3f6713dc230258b000fe..bdc7fe11ef1ceda345d21057f0e21bdab2c3e6ca 100644
--- a/src/heap.h
+++ b/src/heap.h
@@ -1363,6 +1363,10 @@ class Heap {
     return maximum_size_scavenges_ > 0;
   }
 
+  bool DeoptMaybeTenuredAllocationSites() {
+    return new_space_.IsAtMaximumCapacity() && maximum_size_scavenges_ == 0;
+  }
+
   // ObjectStats are kept in two arrays, counts and sizes. Related stats are
   // stored in a contiguous linear buffer. Stats groups are stored one after
   // another.