[elements] Avoid using IsKey in loops

src/objects.h

 // Copyright 2015 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 <iosfwd>
 
 #include "src/assert-scope.h"
@@ skipping 3193 matching lines @@
   inline void ElementRemoved();
   inline void ElementsRemoved(int n);
 
   // Computes the required capacity for a table holding the given
   // number of elements. May be more than HashTable::kMaxCapacity.
   static inline int ComputeCapacity(int at_least_space_for);
 
   // Tells whether k is a real key.  The hole and undefined are not allowed
   // as keys and can be used to indicate missing or deleted elements.
   inline bool IsKey(Object* k);
+  inline bool IsKey(Heap* heap, Object* k);
 
   // Compute the probe offset (quadratic probing).
   INLINE(static uint32_t GetProbeOffset(uint32_t n)) {
     return (n + n * n) >> 1;
   }
 
   static const int kNumberOfElementsIndex = 0;
   static const int kNumberOfDeletedElementsIndex = 1;
   static const int kCapacityIndex = 2;
   static const int kPrefixStartIndex = 3;
@@ skipping 7693 matching lines @@
     }
     return value;
   }
 };
 
 
 }  // NOLINT, false-positive due to second-order macros.
 }  // NOLINT, false-positive due to second-order macros.
 
 #endif  // V8_OBJECTS_H_