Cast: Removed unnecessary ref counters.

media/cast/video_sender/video_encoder.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_encoder.h"
 
 #include "base/bind.h"
 #include "base/logging.h"
+#include "base/message_loop/message_loop.h"
 
 namespace media {
 namespace cast {
 
 VideoEncoder::VideoEncoder(scoped_refptr<CastEnvironment> cast_environment,
                            const VideoSenderConfig& video_config,
                            uint8 max_unacked_frames)
     : video_config_(video_config),
       cast_environment_(cast_environment),
       skip_next_frame_(false),
-      skip_count_(0) {
+      skip_count_(0),
+      weak_factory_(this) {
   if (video_config.codec == kVp8) {
     vp8_encoder_.reset(new Vp8Encoder(video_config, max_unacked_frames));
   } else {
     DCHECK(false) << "Invalid config";  // Codec not supported.
   }
 
   dynamic_config_.key_frame_requested = false;
   dynamic_config_.latest_frame_id_to_reference = kStartFrameId;
   dynamic_config_.bit_rate = video_config.start_bitrate;
 }
 
 VideoEncoder::~VideoEncoder() {}
 
 bool VideoEncoder::EncodeVideoFrame(
     const I420VideoFrame* video_frame,
     const base::TimeTicks& capture_time,
     const FrameEncodedCallback& frame_encoded_callback,
     const base::Closure frame_release_callback) {
+  DCHECK(cast_environment_->CurrentlyOn(CastEnvironment::MAIN));
   if (video_config_.codec != kVp8) return false;
 
   if (skip_next_frame_) {
     ++skip_count_;
     VLOG(1) << "Skip encoding frame";
     return false;
   }
 
   cast_environment_->PostTask(CastEnvironment::VIDEO_ENCODER, FROM_HERE,
-      base::Bind(&VideoEncoder::EncodeVideoFrameEncoderThread, this,
-          video_frame, capture_time, dynamic_config_, frame_encoded_callback,
-          frame_release_callback));
+      base::Bind(&VideoEncoder::EncodeVideoFrameEncoderThread,
+          weak_factory_.GetWeakPtr(), video_frame, capture_time,
+          dynamic_config_, frame_encoded_callback, frame_release_callback));
 
   dynamic_config_.key_frame_requested = false;
   return true;
 }
 
 void VideoEncoder::EncodeVideoFrameEncoderThread(
     const I420VideoFrame* video_frame,
     const base::TimeTicks& capture_time,
     const CodecDynamicConfig& dynamic_config,
     const FrameEncodedCallback& frame_encoded_callback,
@@ skipping 44 matching lines @@
 void VideoEncoder::LatestFrameIdToReference(uint8 frame_id) {
   dynamic_config_.latest_frame_id_to_reference = frame_id;
 }
 
 int VideoEncoder::NumberOfSkippedFrames() const {
   return skip_count_;
 }
 
 }  //  namespace cast
 }  //  namespace media