Unify the macOS and iOS capturer implementations

webrtc/modules/video_capture/objc/rtc_video_capture_objc.h

 /*
  *  Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#ifndef WEBRTC_MODULES_VIDEO_CAPTURE_IOS_VIDEO_CAPTURE_IOS_OBJC_H_
-#define WEBRTC_MODULES_VIDEO_CAPTURE_IOS_VIDEO_CAPTURE_IOS_OBJC_H_
+#ifndef WEBRTC_MODULES_VIDEO_CAPTURE_OBJC_RTC_VIDEO_CAPTURE_OBJC_H_
+#define WEBRTC_MODULES_VIDEO_CAPTURE_OBJC_RTC_VIDEO_CAPTURE_OBJC_H_
 
 #import <Foundation/Foundation.h>
+#ifdef WEBRTC_IOS
 #import <UIKit/UIKit.h>
+#endif
 
-#include "webrtc/modules/video_capture/ios/video_capture_ios.h"
+#include "webrtc/modules/video_capture/objc/video_capture.h"
 
 // The following class listens to a notification with name:
 // 'StatusBarOrientationDidChange'.
 // This notification must be posted in order for the capturer to reflect the
 // orientation change in video w.r.t. the application orientation.
 @interface RTCVideoCaptureIosObjC
     : NSObject<AVCaptureVideoDataOutputSampleBufferDelegate>
 
 @property webrtc::VideoRotation frameRotation;
 
 // custom initializer. Instance of VideoCaptureIos is needed
 // for callback purposes.
 // default init methods have been overridden to return nil.
 - (id)initWithOwner:(webrtc::videocapturemodule::VideoCaptureIos*)owner
           captureId:(int)captureId;
 - (BOOL)setCaptureDeviceByUniqueId:(NSString*)uniqueId;
 - (BOOL)startCaptureWithCapability:
-        (const webrtc::VideoCaptureCapability&)capability;
+    (const webrtc::VideoCaptureCapability&)capability;
 - (BOOL)stopCapture;
 
 @end
-#endif  // WEBRTC_MODULES_VIDEO_CAPTURE_IOS_VIDEO_CAPTURE_IOS_OBJC_H_
+#endif  // WEBRTC_MODULES_VIDEO_CAPTURE_OBJC_RTC_VIDEO_CAPTURE_OBJC_H_