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

media/cast/cast_sender_impl.cc

Index: media/cast/cast_sender_impl.cc
diff --git a/media/cast/cast_sender_impl.cc b/media/cast/cast_sender_impl.cc
index 2bcad36ccee0e2f2bcf5738235b4a4e28726b320..53e1298a7748be2769f96a8f591097f54a7a4de6 100644
--- a/media/cast/cast_sender_impl.cc
+++ b/media/cast/cast_sender_impl.cc
@@ -100,8 +100,7 @@ void CastSenderImpl::InitializeAudio(
   audio_sender_.reset(
       new AudioSender(cast_environment_, audio_config, transport_sender_));
 
-  CastInitializationStatus status = audio_sender_->InitializationResult();
-
+  const CastInitializationStatus status = audio_sender_->InitializationResult();
   if (status == STATUS_AUDIO_INITIALIZED) {
     ssrc_of_audio_sender_ = audio_config.incoming_feedback_ssrc;
     audio_frame_input_ =
@@ -118,18 +117,20 @@ void CastSenderImpl::InitializeVideo(
   DCHECK(cast_environment_->CurrentlyOn(CastEnvironment::MAIN));
   CHECK(video_config.use_external_encoder ||
         cast_environment_->HasVideoThread());
-  VLOG(1) << "CastSender::ctor";

[Alpha Left Google, 2014/06/03 18:48:35]

Hey please don't remove this. It's useful for debugging. Or removing the logging
for dtor as well.

[miu, 2014/06/03 19:57:50]

Done.  I also "improved" all the VLOGs so that one can differentiate logging
from the audio sender vs video sender.

 
   video_sender_.reset(new VideoSender(cast_environment_,
                                       video_config,
                                       create_vea_cb,
                                       create_video_encode_mem_cb,
-                                      cast_initialization_cb,
                                       transport_sender_));
 
-  ssrc_of_video_sender_ = video_config.incoming_feedback_ssrc;
-  video_frame_input_ =
-      new LocalVideoFrameInput(cast_environment_, video_sender_->AsWeakPtr());
+  const CastInitializationStatus status = video_sender_->InitializationResult();
+  if (status == STATUS_VIDEO_INITIALIZED) {
+    ssrc_of_video_sender_ = video_config.incoming_feedback_ssrc;
+    video_frame_input_ =
+        new LocalVideoFrameInput(cast_environment_, video_sender_->AsWeakPtr());
+  }
+  cast_initialization_cb.Run(status);
 }
 
 CastSenderImpl::~CastSenderImpl() {