Remove deprecated QTKit Video Capture Support

media/capture/video/mac/platform_video_capturing_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_PLATFORM_VIDEO_CAPTURING_MAC_H_
 #define MEDIA_CAPTURE_VIDEO_MAC_PLATFORM_VIDEO_CAPTURING_MAC_H_
 
 #import <Foundation/Foundation.h>
 
 namespace media {
 class VideoCaptureDeviceMac;
 }
 
-// Protocol representing platform-dependent video capture on Mac, implemented
-// by both QTKit and AVFoundation APIs.
+// Protocol representing platform-dependent video capture on Mac.
 @protocol PlatformVideoCapturingMac<NSObject>
 
 // This method initializes the instance by calling NSObject |init| and registers
 // internally a frame receiver at the same time. The frame receiver is supposed
 // to be initialised before and outlive the VideoCapturingDeviceMac
 // implementation.
 - (id)initWithFrameReceiver:(media::VideoCaptureDeviceMac*)frameReceiver;
 
 // Sets the frame receiver. This method executes the registration in mutual
 // exclusion.
@@ skipping 18 matching lines @@
 // Starts video capturing, registers observers. Returns YES on success, NO
 // otherwise.
 - (BOOL)startCapture;
 
 // Stops video capturing, unregisters observers.
 - (void)stopCapture;
 
 @end
 
 #endif  // MEDIA_CAPTURE_VIDEO_MAC_PLATFORM_VIDEO_CAPTURING_MAC_H_