Mark some destructors as virtual.

components/rappor/byte_vector_utils.h

 // Copyright 2014 The Chromium 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 COMPONENTS_RAPPOR_BYTE_VECTOR_UTILS_H_
 #define COMPONENTS_RAPPOR_BYTE_VECTOR_UTILS_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
@@ skipping 25 matching lines @@
 
 // Counts the number of bits set in the byte vector.
 int CountBits(const ByteVector& vector);
 
 // A utility object for generating random binary data with different
 // likelihood of bits being true, using entropy from crypto::RandBytes().
 class ByteVectorGenerator {
  public:
   explicit ByteVectorGenerator(size_t byte_count);
 
-  ~ByteVectorGenerator();
+  virtual ~ByteVectorGenerator();
 
   // Generates a random byte vector where the bits are independent random
   // variables which are true with the given |probability|.
   ByteVector GetWeightedRandomByteVector(Probability probability);
 
  protected:
   // Size of vectors to be generated.
   size_t byte_count() const { return byte_count_; }
 
   // Generates a random vector of bytes from a uniform distribution.
@@ skipping 16 matching lines @@
 // based on a secret seed.
 class HmacByteVectorGenerator : public ByteVectorGenerator {
  public:
   // Constructor takes the size of the vector to generate, along with a
   // |entropy_input| and |personalization_string| to seed the pseudo-random
   // number generator.  The string parameters are treated as byte arrays.
   HmacByteVectorGenerator(size_t byte_count,
                           const std::string& entropy_input,
                           const std::string& personalization_string);
 
-  ~HmacByteVectorGenerator();
+  virtual ~HmacByteVectorGenerator();
 
   // Generates a random string suitable for passing to the constructor as
   // |entropy_input|.
   static std::string GenerateEntropyInput();
 
   // Key size required for 128-bit security strength (including nonce).
   static const size_t kEntropyInputSize;
 
  protected:
   // Generate byte vector generator that streams from the next request instead
@@ skipping 12 matching lines @@
 
   // Total number of bytes streamed from the HMAC_DRBG Generate Process.
   size_t generated_bytes_;
 
   DISALLOW_ASSIGN(HmacByteVectorGenerator);
 };
 
 }  // namespace rappor
 
 #endif  // COMPONENTS_RAPPOR_BYTE_VECTOR_UTILS_H_