[Cast] Clean-up: Move max_unacked_frames into CongestionControl.

media/cast/sender/vp8_encoder.h

 // Copyright 2014 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.
 
 #ifndef MEDIA_CAST_SENDER_CODECS_VP8_VP8_ENCODER_H_
 #define MEDIA_CAST_SENDER_CODECS_VP8_VP8_ENCODER_H_
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/threading/thread_checker.h"
 #include "media/cast/cast_config.h"
 #include "media/cast/sender/software_video_encoder.h"
 #include "third_party/libvpx/source/libvpx/vpx/vpx_encoder.h"
 
 namespace media {
 class VideoFrame;
 }
 
 namespace media {
 namespace cast {
 
 class Vp8Encoder : public SoftwareVideoEncoder {
  public:
-  Vp8Encoder(const VideoSenderConfig& video_config, int max_unacked_frames);
+  explicit Vp8Encoder(const VideoSenderConfig& video_config);
 
   virtual ~Vp8Encoder();
 
   // SoftwareVideoEncoder implementations.
   virtual void Initialize() override;
   virtual void Encode(const scoped_refptr<media::VideoFrame>& video_frame,
                       const base::TimeTicks& reference_time,
                       EncodedFrame* encoded_frame) override;
   virtual void UpdateRates(uint32 new_bitrate) override;
   virtual void GenerateKeyFrame() override;
@@ skipping 63 matching lines @@
   // This is bound to the thread where Initialize() is called.
   base::ThreadChecker thread_checker_;
 
   DISALLOW_COPY_AND_ASSIGN(Vp8Encoder);
 };
 
 }  // namespace cast
 }  // namespace media
 
 #endif  // MEDIA_CAST_SENDER_CODECS_VP8_VP8_ENCODER_H_