Eliminate video capture thread in renderer

content/renderer/media/rtc_video_capturer.h

 // Copyright (c) 2012 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 CONTENT_RENDERER_MEDIA_RTC_VIDEO_CAPTURER_H_
 #define CONTENT_RENDERER_MEDIA_RTC_VIDEO_CAPTURER_H_
 
 #include <vector>
 
 #include "base/compiler_specific.h"
 #include "content/renderer/media/rtc_video_capture_delegate.h"
 #include "third_party/libjingle/source/talk/media/base/videocapturer.h"
 
 namespace content {
-class VideoCaptureImplManager;
 
 // RtcVideoCapturer implements a simple cricket::VideoCapturer that is used for
 // VideoCapturing in libJingle and especially in PeerConnections.
 // The class is created and destroyed on the main render thread.
 // PeerConnection access cricket::VideoCapturer from a libJingle worker thread.
 // The video frames are delivered in OnFrameCaptured on a thread owned by
 // Chrome's video capture implementation.
 class RtcVideoCapturer
     : public cricket::VideoCapturer {
  public:
   RtcVideoCapturer(const media::VideoCaptureSessionId id,
-                   VideoCaptureImplManager* vc_manager,
                    bool is_screencast);
   virtual ~RtcVideoCapturer();
 
   // cricket::VideoCapturer implementation.
   // These methods are accessed from a libJingle worker thread.
   virtual cricket::CaptureState Start(
       const cricket::VideoFormat& capture_format) OVERRIDE;
   virtual void Stop() OVERRIDE;
   virtual bool IsRunning() OVERRIDE;
   virtual bool GetPreferredFourccs(std::vector<uint32>* fourccs) OVERRIDE;
@@ skipping 12 matching lines @@
   scoped_refptr<RtcVideoCaptureDelegate> delegate_;
   VideoCaptureState state_;
   base::TimeDelta first_frame_timestamp_;
 
   DISALLOW_COPY_AND_ASSIGN(RtcVideoCapturer);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_RTC_VIDEO_CAPTURER_H_