Make tests pass with weak closure overapproximation enabled

src/heap/incremental-marking.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_HEAP_INCREMENTAL_MARKING_H_
 #define V8_HEAP_INCREMENTAL_MARKING_H_
 
 
 #include "src/execution.h"
 #include "src/heap/mark-compact.h"
@@ skipping 24 matching lines @@
     return state_;
   }
 
   bool should_hurry() { return should_hurry_; }
   void set_should_hurry(bool val) { should_hurry_ = val; }
 
   bool weak_closure_was_overapproximated() const {
     return weak_closure_was_overapproximated_;
   }
 
+  void SetWeakClosureWasOverApproximatedForTesting(bool val) {
+    weak_closure_was_overapproximated_ = val;
+  }
+
   inline bool IsStopped() { return state() == STOPPED; }
 
   INLINE(bool IsMarking()) { return state() >= MARKING; }
 
   inline bool IsMarkingIncomplete() { return state() == MARKING; }
 
   inline bool IsComplete() { return state() == COMPLETE; }
 
   inline bool IsReadyToOverApproximateWeakClosure() const {
-    return request_type_ == OVERAPPROXIMATION;
+    return request_type_ == OVERAPPROXIMATION &&
+           !weak_closure_was_overapproximated_;
   }
 
   GCRequestType request_type() const { return request_type_; }
 
   bool WorthActivating();
 
   bool ShouldActivate();
 
   bool WasActivated();
 
@@ skipping 188 matching lines @@
   int weak_closure_approximation_rounds_;
 
   GCRequestType request_type_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(IncrementalMarking);
 };
 }
 }  // namespace v8::internal
 
 #endif  // V8_HEAP_INCREMENTAL_MARKING_H_