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

src/objects.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_OBJECTS_H_
 #define V8_OBJECTS_H_
 
 #include "src/allocation.h"
 #include "src/assert-scope.h"
 #include "src/builtins.h"
@@ skipping 8485 matching lines @@
   }
 
   // The pretenuring decision is made during gc, and the zombie state allows
   // us to recognize when an allocation site is just being kept alive because
   // a later traversal of new space may discover AllocationMementos that point
   // to this AllocationSite.
   bool IsZombie() {
     return pretenure_decision() == kZombie;
   }
 
+  bool IsMaybeTenure() {
+    return pretenure_decision() == kMaybeTenure;
+  }
+
   inline void MarkZombie();
 
   inline bool MakePretenureDecision(PretenureDecision current_decision,
                                     double ratio,
                                     bool maximum_size_scavenge);
 
   inline bool DigestPretenuringFeedback(bool maximum_size_scavenge);
 
   ElementsKind GetElementsKind() {
     ASSERT(!SitePointsToLiteral());
@@ skipping 2555 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_