[Cast] Cleanup: Remove TransportXXXXXSender, an unnecessary layer of indirection.

media/cast/transport/utility/transport_encryption_handler.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 MEDIA_CAST_TRANSPORT_TRANSPORT_UTILITY_ENCRYPTION_HANDLER_H_
 #define MEDIA_CAST_TRANSPORT_TRANSPORT_UTILITY_ENCRYPTION_HANDLER_H_
 
 // Helper class to handle encryption for the Cast Transport library.
 #include <string>
 
@@ skipping 19 matching lines @@
   bool Initialize(std::string aes_key, std::string aes_iv_mask);
 
   bool Encrypt(uint32 frame_id,
                const base::StringPiece& data,
                std::string* encrypted_data);
 
   bool Decrypt(uint32 frame_id,
                const base::StringPiece& ciphertext,
                std::string* plaintext);
 
+  // TODO(miu): This naming is very misleading.  It should be called
+  // is_activated() since Initialize() without keys (i.e., cypto is disabled)
+  // may have succeeded.
   bool initialized() const { return initialized_; }
 
  private:
   scoped_ptr<crypto::SymmetricKey> key_;
   scoped_ptr<crypto::Encryptor> encryptor_;
   std::string iv_mask_;
   bool initialized_;
 
   DISALLOW_COPY_AND_ASSIGN(TransportEncryptionHandler);
 };
 
 }  // namespace transport
 }  // namespace cast
 }  // namespace media
 
 #endif  // MEDIA_CAST_TRANSPORT_TRANSPORT_UTILITY_ENCRYPTION_HANDLER_H_