[ignition/turbofan] Wrap bytecode liveness bitvectors

src/bit-vector.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_DATAFLOW_H_
 #define V8_DATAFLOW_H_
 
 #include "src/allocation.h"
 #include "src/zone/zone.h"
 
@@ skipping 148 matching lines @@
     }
   }
 
   bool IsEmpty() const {
     for (int i = 0; i < data_length_; i++) {
       if (data_[i] != 0) return false;
     }
     return true;
   }
 
-  bool Equals(const BitVector& other) {
+  bool Equals(const BitVector& other) const {
     for (int i = 0; i < data_length_; i++) {
       if (data_[i] != other.data_[i]) return false;
     }
     return true;
   }
 
   int Count() const;
 
   int length() const { return length_; }
 
@@ skipping 65 matching lines @@
     bits_ = new_bits;
   }
 
   BitVector* bits_;
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_DATAFLOW_H_