Cast: Let the extension control if DSCP is on or off.

chrome/renderer/media/cast_session_delegate.cc

 // 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.
 
 #include "chrome/renderer/media/cast_session_delegate.h"
 
 #include "base/lazy_instance.h"
 #include "base/logging.h"
 #include "base/message_loop/message_loop_proxy.h"
 #include "chrome/common/chrome_version_info.h"
@@ skipping 64 matching lines @@
   video_frame_input_available_callback_ = callback;
 
   cast_sender_->InitializeVideo(
       config,
       base::Bind(&CastSessionDelegate::InitializationResultCB,
                  weak_factory_.GetWeakPtr()),
       create_vea_cb,
       create_video_encode_mem_cb);
 }
 
-void CastSessionDelegate::StartUDP(const net::IPEndPoint& remote_endpoint) {
+void CastSessionDelegate::StartUDP(const net::IPEndPoint& remote_endpoint,
+                                   const std::string& options) {
   DCHECK(io_message_loop_proxy_->BelongsToCurrentThread());
 
   // CastSender uses the renderer's IO thread as the main thread. This reduces
   // thread hopping for incoming video frames and outgoing network packets.
   cast_environment_ = new CastEnvironment(
       scoped_ptr<base::TickClock>(new base::DefaultTickClock()).Pass(),
       base::MessageLoopProxy::current(),
       g_cast_threads.Get().GetAudioEncodeMessageLoopProxy(),
       g_cast_threads.Get().GetVideoEncodeMessageLoopProxy());
 
   event_subscribers_.reset(
       new media::cast::RawEventSubscriberBundle(cast_environment_));
 
   // Rationale for using unretained: The callback cannot be called after the
   // destruction of CastTransportSenderIPC, and they both share the same thread.
   cast_transport_.reset(new CastTransportSenderIPC(
       remote_endpoint,
+      options,
       base::Bind(&CastSessionDelegate::StatusNotificationCB,
                  base::Unretained(this)),
       base::Bind(&CastSessionDelegate::LogRawEvents, base::Unretained(this))));
 
   cast_sender_ = CastSender::Create(cast_environment_, cast_transport_.get());
 }
 
 void CastSessionDelegate::ToggleLogging(bool is_audio, bool enable) {
   DCHECK(io_message_loop_proxy_->BelongsToCurrentThread());
   if (!event_subscribers_.get())
@@ skipping 136 matching lines @@
     } else {
       cast_environment_->Logging()->InsertFrameEvent(
           it->timestamp,
           it->type,
           it->media_type,
           it->rtp_timestamp,
           it->frame_id);
     }
   }
 }