Reland of Split iOS sdk in to separate targets

webrtc/sdk/objc/Framework/Classes/PeerConnection/RTCVideoSource+Private.h

Index: webrtc/sdk/objc/Framework/Classes/PeerConnection/RTCVideoSource+Private.h
diff --git a/webrtc/sdk/objc/Framework/Classes/PeerConnection/RTCVideoSource+Private.h b/webrtc/sdk/objc/Framework/Classes/PeerConnection/RTCVideoSource+Private.h
new file mode 100644
index 0000000000000000000000000000000000000000..f6e202cd9b8499dd98ff47e1c08c7779c6128cc7
--- /dev/null
+++ b/webrtc/sdk/objc/Framework/Classes/PeerConnection/RTCVideoSource+Private.h
@@ -0,0 +1,40 @@
+/*
+ *  Copyright 2015 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.
+ */
+
+#import "WebRTC/RTCVideoSource.h"
+
+#import "RTCMediaSource+Private.h"
+
+#include "webrtc/api/mediastreaminterface.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface RTCVideoSource ()
+
+/**
+ * The VideoTrackSourceInterface object passed to this RTCVideoSource during
+ * construction.
+ */
+@property(nonatomic, readonly)
+    rtc::scoped_refptr<webrtc::VideoTrackSourceInterface>
+        nativeVideoSource;
+
+/** Initialize an RTCVideoSource from a native VideoTrackSourceInterface. */
+- (instancetype)initWithNativeVideoSource:
+    (rtc::scoped_refptr<webrtc::VideoTrackSourceInterface>)nativeVideoSource
+    NS_DESIGNATED_INITIALIZER;
+
+- (instancetype)initWithNativeMediaSource:
+    (rtc::scoped_refptr<webrtc::MediaSourceInterface>)nativeMediaSource
+                                     type:(RTCMediaSourceType)type NS_UNAVAILABLE;
+
+@end
+
+NS_ASSUME_NONNULL_END