Remove unused private functions from Encryptor

crypto/encryptor.h

 // Copyright (c) 2012 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 CRYPTO_ENCRYPTOR_H_
 #define CRYPTO_ENCRYPTOR_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 66 matching lines @@
 
   // Sets the counter value when in CTR mode. Currently only 128-bits
   // counter value is supported.
   //
   // Returns true only if update was successful.
   bool SetCounter(const base::StringPiece& counter);
 
   // TODO(albertb): Support streaming encryption.
 
  private:
-  // Generates a mask using |counter_| to be used for encryption in CTR mode.
-  // Resulting mask will be written to |mask| with |mask_len| bytes.
-  //
-  // Make sure there's enough space in mask when calling this method.
-  // Reserve at least |plaintext_len| + 16 bytes for |mask|.
-  //
-  // The generated mask will always have at least |plaintext_len| bytes and
-  // will be a multiple of the counter length.
-  //
-  // This method is used only in CTR mode.
-  //
-  // Returns false if this call failed.
-  bool GenerateCounterMask(size_t plaintext_len,
-                           uint8_t* mask,
-                           size_t* mask_len);
-
-  // Mask the |plaintext| message using |mask|. The output will be written to
-  // |ciphertext|. |ciphertext| must have at least |plaintext_len| bytes.
-  void MaskMessage(const void* plaintext,
-                   size_t plaintext_len,
-                   const void* mask,
-                   void* ciphertext) const;
-
   SymmetricKey* key_;
   Mode mode_;
   std::unique_ptr<Counter> counter_;
 
   bool Crypt(bool do_encrypt,  // Pass true to encrypt, false to decrypt.
              const base::StringPiece& input,
              std::string* output);
   bool CryptCTR(bool do_encrypt,
                 const base::StringPiece& input,
                 std::string* output);
   std::string iv_;
 };
 
 }  // namespace crypto
 
 #endif  // CRYPTO_ENCRYPTOR_H_