Remove platform_video_capturing_mac and the callback thread checker in VideoCaptureDeviceAVFoundati…

media/capture/video/mac/video_capture_device_avfoundation_mac.h

 // 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.
 
 #ifndef MEDIA_CAPTURE_VIDEO_MAC_VIDEO_CAPTURE_DEVICE_AVFOUNDATION_MAC_H_
 #define MEDIA_CAPTURE_VIDEO_MAC_VIDEO_CAPTURE_DEVICE_AVFOUNDATION_MAC_H_
 
 #import <Foundation/Foundation.h>
 
 #import "base/mac/scoped_nsobject.h"
 #include "base/synchronization/lock.h"
 #include "base/threading/thread_checker.h"
 #import "media/base/mac/avfoundation_glue.h"
 #include "media/base/video_capture_types.h"
-#import "media/capture/video/mac/platform_video_capturing_mac.h"
 #include "media/capture/video/video_capture_device.h"
 
 namespace media {
 class VideoCaptureDeviceMac;
 }
 
 @class CrAVCaptureDevice;
 @class CrAVCaptureSession;
 @class CrAVCaptureVideoDataOutput;
 
@@ skipping 23 matching lines @@
 //    restarted and restoped multiple times, reconfiguring or not the device in
 //    between.
 //  * -setCaptureDevice can be called with a |nil| value, case in which it stops
 //    the capture and disconnects the library objects. This step is not
 //    necessary.
 //  * Deallocation of the library objects happens gracefully on destruction of
 //    the VideoCaptureDeviceAVFoundation object.
 //
 //
 @interface VideoCaptureDeviceAVFoundation
-    : NSObject<CrAVCaptureVideoDataOutputSampleBufferDelegate,
-               PlatformVideoCapturingMac> {
+    : NSObject<CrAVCaptureVideoDataOutputSampleBufferDelegate> {
  @private
   // The following attributes are set via -setCaptureHeight:width:frameRate:.
   int frameWidth_;
   int frameHeight_;
   float frameRate_;
 
   base::Lock lock_;  // Protects concurrent setting and using of frameReceiver_.
   media::VideoCaptureDeviceMac* frameReceiver_;  // weak.
 
   base::scoped_nsobject<CrAVCaptureSession> captureSession_;
 
   // |captureDevice_| is an object coming from AVFoundation, used only to be
   // plugged in |captureDeviceInput_| and to query for session preset support.
   CrAVCaptureDevice* captureDevice_;
   // |captureDeviceInput_| is owned by |captureSession_|.
   CrAVCaptureDeviceInput* captureDeviceInput_;
   base::scoped_nsobject<CrAVCaptureVideoDataOutput> captureVideoDataOutput_;
 
   base::ThreadChecker main_thread_checker_;
-  base::ThreadChecker callback_thread_checker_;
 }
 
 // Returns a dictionary of capture devices with friendly name and unique id.
 + (NSDictionary*)deviceNames;
 
 // Retrieve the capture supported formats for a given device |name|.
 + (void)getDevice:(const media::VideoCaptureDevice::Name&)name
     supportedFormats:(media::VideoCaptureFormats*)formats;
 
 // Initializes the instance and the underlying capture session and registers the
@@ skipping 22 matching lines @@
 // called after setCaptureDevice:, and, eventually, also after
 // setCaptureHeight:width:frameRate:. Returns YES on success, NO otherwise.
 - (BOOL)startCapture;
 
 // Stops video capturing and stops listening to notifications.
 - (void)stopCapture;
 
 @end
 
 #endif  // MEDIA_CAPTURE_VIDEO_MAC_VIDEO_CAPTURE_DEVICE_AVFOUNDATION_MAC_H_