Reland of Unify the macOS and iOS capturer implementations

webrtc/modules/video_capture/objc/video_capture.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_H_
-#define WEBRTC_MODULES_VIDEO_CAPTURE_IOS_VIDEO_CAPTURE_IOS_H_
+#ifndef WEBRTC_MODULES_VIDEO_CAPTURE_OBJC_VIDEO_CAPTURE_H_
+#define WEBRTC_MODULES_VIDEO_CAPTURE_OBJC_VIDEO_CAPTURE_H_
 
 #include "webrtc/base/scoped_ref_ptr.h"
 #include "webrtc/modules/video_capture/video_capture_impl.h"
 
 @class RTCVideoCaptureIosObjC;
 
 namespace webrtc {
 namespace videocapturemodule {
 class VideoCaptureIos : public VideoCaptureImpl {
  public:
@@ skipping 13 matching lines @@
  private:
   RTCVideoCaptureIosObjC* capture_device_;
   bool is_capturing_;
   int32_t id_;
   VideoCaptureCapability capability_;
 };
 
 }  // namespace videocapturemodule
 }  // namespace webrtc
 
-#endif  // WEBRTC_MODULES_VIDEO_CAPTURE_IOS_VIDEO_CAPTURE_IOS_H_
+#endif  // WEBRTC_MODULES_VIDEO_CAPTURE_OBJC_VIDEO_CAPTURE_H_