Make VideoCaptureController single-threaded and not ref counted.

media/video/capture/mac/video_capture_device_mac.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.
 
 // OS X implementation of VideoCaptureDevice, using QTKit as native capture API.
 
 #ifndef MEDIA_VIDEO_CAPTURE_MAC_VIDEO_CAPTURE_DEVICE_MAC_H_
 #define MEDIA_VIDEO_CAPTURE_MAC_VIDEO_CAPTURE_DEVICE_MAC_H_
 
 #include <string>
 
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "base/message_loop/message_loop_proxy.h"
 #include "media/video/capture/video_capture_device.h"
 #include "media/video/capture/video_capture_types.h"
 
 @class VideoCaptureDeviceQTKit;
 
 namespace media {
 
 // Called by VideoCaptureManager to open, close and start, stop video capture
 // devices.
-class VideoCaptureDeviceMac : public VideoCaptureDevice {
+class VideoCaptureDeviceMac : public VideoCaptureDevice1 {
  public:
   explicit VideoCaptureDeviceMac(const Name& device_name);
   virtual ~VideoCaptureDeviceMac();
 
   // VideoCaptureDevice implementation.
   virtual void Allocate(const VideoCaptureCapability& capture_format,
                          VideoCaptureDevice::EventHandler* observer) OVERRIDE;
   virtual void Start() OVERRIDE;
   virtual void Stop() OVERRIDE;
   virtual void DeAllocate() OVERRIDE;
@@ skipping 32 matching lines @@
   base::WeakPtr<VideoCaptureDeviceMac> weak_this_;
 
   VideoCaptureDeviceQTKit* capture_device_;
 
   DISALLOW_COPY_AND_ASSIGN(VideoCaptureDeviceMac);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_VIDEO_CAPTURE_MAC_VIDEO_CAPTURE_DEVICE_MAC_H_