Cast: Added missing DCHECKs to ThreadChecker calls and minor cleanup.

media/cast/video_sender/video_sender.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 "media/cast/video_sender/video_sender.h"
 
 #include <list>
 
 #include "base/bind.h"
 #include "base/logging.h"
@@ skipping 76 matching lines @@
     scoped_refptr<CastEnvironment> cast_environment,
     const VideoSenderConfig& video_config,
     const scoped_refptr<GpuVideoAcceleratorFactories>& gpu_factories,
     const CastInitializationCallback& initialization_status,
     transport::CastTransportSender* const transport_sender)
     : rtp_max_delay_(base::TimeDelta::FromMilliseconds(
           video_config.rtp_config.max_delay_ms)),
       max_frame_rate_(video_config.max_frame_rate),
       cast_environment_(cast_environment),
       transport_sender_(transport_sender),
-      event_subscriber_(
-          cast_environment_->GetMessageSingleThreadTaskRunnerForThread(
-              CastEnvironment::MAIN),
-          kMaxEventSubscriberEntries),
+      event_subscriber_(kMaxEventSubscriberEntries),
       rtcp_feedback_(new LocalRtcpVideoSenderFeedback(this)),
       last_acked_frame_id_(-1),
       last_sent_frame_id_(-1),
       duplicate_ack_(0),
       last_skip_count_(0),
       congestion_control_(cast_environment->Clock(),
                           video_config.congestion_control_back_off,
                           video_config.max_bitrate, video_config.min_bitrate,
                           video_config.start_bitrate),
       initialized_(false),
@@ skipping 365 matching lines @@
 
 void VideoSender::ResendPacketsOnTransportThread(
     const transport::MissingFramesAndPacketsMap& missing_packets) {
   DCHECK(cast_environment_->CurrentlyOn(CastEnvironment::TRANSPORT));
   last_send_time_ = cast_environment_->Clock()->NowTicks();
   transport_sender_->ResendPackets(false, missing_packets);
 }
 
 }  // namespace cast
 }  // namespace media