Add Mac implementations of new SymmetricKey and Encryptor classes.

base/crypto/encryptor.h

 // Copyright (c) 2010 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 BASE_CRYPTO_ENCRYPTOR_H_
 #define BASE_CRYPTO_ENCRYPTOR_H_
 
 #include <string>
 
 #include "base/crypto/symmetric_key.h"
@@ skipping 22 matching lines @@
 
   // TODO(albertb): Support streaming encryption.
 
  private:
   Mode mode_;
   scoped_ptr<SymmetricKey> key_;
 
 #if defined(USE_NSS)
   ScopedPK11Slot slot_;
   ScopedSECItem param_;
+#elif defined(OS_MACOSX)
+  bool Crypt(int /*CCOperation*/ op,
+             const std::string& input,
+             std::string* output);
+
+  std::string iv_;
 #endif
 };
 
 }  // namespace base
 
 #endif  // BASE_CRYPTO_ENCRYPTOR_H_