Revert of Unify the macOS and iOS capturer implementations

webrtc/modules/video_capture/ios/device_info_ios_objc.h

Index: webrtc/modules/video_capture/ios/device_info_ios_objc.h
diff --git a/webrtc/modules/video_capture/ios/device_info_ios_objc.h b/webrtc/modules/video_capture/ios/device_info_ios_objc.h
new file mode 100644
index 0000000000000000000000000000000000000000..d67b559972875119c53637f56ccfe56c36c6b231
--- /dev/null
+++ b/webrtc/modules/video_capture/ios/device_info_ios_objc.h
@@ -0,0 +1,29 @@
+/*
+ *  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_DEVICE_INFO_IOS_OBJC_H_
+#define WEBRTC_MODULES_VIDEO_CAPTURE_IOS_DEVICE_INFO_IOS_OBJC_H_
+
+#import <AVFoundation/AVFoundation.h>
+
+#include "webrtc/modules/video_capture/video_capture_defines.h"
+
+@interface DeviceInfoIosObjC : NSObject
++ (int)captureDeviceCount;
++ (AVCaptureDevice*)captureDeviceForIndex:(int)index;
++ (AVCaptureDevice*)captureDeviceForUniqueId:(NSString*)uniqueId;
++ (NSString*)deviceNameForIndex:(int)index;
++ (NSString*)deviceUniqueIdForIndex:(int)index;
++ (NSString*)deviceNameForUniqueId:(NSString*)uniqueId;
++ (webrtc::VideoCaptureCapability)capabilityForPreset:(NSString*)preset;
+
+@end
+
+#endif  // WEBRTC_MODULES_VIDEO_CAPTURE_IOS_DEVICE_INFO_IOS_OBJC_H_