Rollback of r15097, r15087 in trunk branch.

src/data-flow.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 197 matching lines @@
               ? new(zone) BitVector(1, zone)
               : target->bits_) { }
     bool Done() const { return it_.Done(); }
     void Advance() { it_.Advance(); }
     int Current() const { return it_.Current(); }
    private:
     BitVector::Iterator it_;
   };
 
   GrowableBitVector() : bits_(NULL) { }
-  GrowableBitVector(int length, Zone* zone)
-      : bits_(new(zone) BitVector(length, zone)) { }
 
   bool Contains(int value) const {
     if (!InBitsRange(value)) return false;
     return bits_->Contains(value);
   }
 
   void Add(int value, Zone* zone) {
     EnsureCapacity(value, zone);
     bits_->Add(value);
   }
@@ skipping 23 matching lines @@
   }
 
   BitVector* bits_;
 };
 
 
 } }  // namespace v8::internal
 
 
 #endif  // V8_DATAFLOW_H_