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

media/cast/cast.gyp

 # Copyright 2013 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.
 
 {
   'variables': {
     'include_tests%': 1,
     'chromium_code': 1,
   },
   'conditions': [
@@ skipping 199 matching lines @@
         'transport/rtcp/rtcp_builder.cc',
         'transport/rtcp/rtcp_builder.h',
         'transport/rtp_sender/packet_storage/packet_storage.cc',
         'transport/rtp_sender/packet_storage/packet_storage.h',
         'transport/rtp_sender/rtp_packetizer/rtp_packetizer.cc',
         'transport/rtp_sender/rtp_packetizer/rtp_packetizer.h',
         'transport/rtp_sender/rtp_sender.cc',
         'transport/rtp_sender/rtp_sender.h',
         'transport/transport/udp_transport.cc',
         'transport/transport/udp_transport.h',
-        'transport/transport_audio_sender.cc',
-        'transport/transport_audio_sender.h',
-        'transport/transport_video_sender.cc',
-        'transport/transport_video_sender.h',
         'transport/utility/transport_encryption_handler.cc',
         'transport/utility/transport_encryption_handler.h',
       ], # source
     },
   ],
 }