Cast: Adding helper crypto classes

media/cast/transport/transport_video_sender.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_VIDEO_SENDER_H_
 #define MEDIA_CAST_TRANSPORT_TRANSPORT_VIDEO_SENDER_H_
 
 #include "base/callback.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/threading/non_thread_safe.h"
 #include "base/time/tick_clock.h"
 #include "media/cast/transport/cast_transport_config.h"
 #include "media/cast/transport/rtp_sender/rtp_sender.h"
-
-namespace crypto {
-class Encryptor;
-class SymmetricKey;
-}
+#include "media/cast/transport/transport_encryption_handler.h"
 
 namespace media {
 class VideoFrame;
 
 namespace cast {
 namespace transport {
 
 class PacedSender;
 
 // Not thread safe. Only called from the main cast transport thread.
@@ skipping 21 matching lines @@
 
   bool initialized() const { return initialized_; }
 
  private:
   // Caller must allocate the destination |encrypted_video_frame| the data
   // member will be resized to hold the encrypted size.
   bool EncryptVideoFrame(const EncodedVideoFrame& encoded_frame,
                          EncodedVideoFrame* encrypted_video_frame);
 
   const base::TimeDelta rtp_max_delay_;
-
+  TransportEncryptionHandler encryptor_;
   RtpSender rtp_sender_;
-  scoped_ptr<crypto::SymmetricKey> key_;
-  scoped_ptr<crypto::Encryptor> encryptor_;
-  std::string iv_mask_;
-
   bool initialized_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(TransportVideoSender);
 };
 
 }  // namespace transport
 }  // namespace cast
 }  // namespace media
 
 #endif  // MEDIA_CAST_TRANSPORT_TRANSPORT_VIDEO_SENDER_H_