Move RTCVideoSource to webrtc/api/objc.

webrtc/api/objc/RTCVideoSource.mm

+/*
+ *  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 "RTCVideoSource.h"
+
+#import "webrtc/api/objc/RTCMediaSource+Private.h"
+#import "webrtc/api/objc/RTCVideoSource+Private.h"
+
+@implementation RTCVideoSource
+
+#pragma mark - Private
+
+- (rtc::scoped_refptr<webrtc::VideoSourceInterface>)nativeVideoSource {
+  webrtc::VideoSourceInterface *videoSource =
+      static_cast<webrtc::VideoSourceInterface *>(self.nativeMediaSource.get());
+  return rtc::scoped_refptr<webrtc::VideoSourceInterface>(videoSource);

[tkchin_webrtc, 2016/01/11 22:59:08]

aha okay. We can't do it this way because we will lose the refcount.
Please refactor the class so that RTCMediaSource is an abstract class with an
abstract method for nativeMediaSource. You can just use [self
doesNotRecognizeSelector:_cmd] in the RTCMediaSource implementation.

In the RTCVideoSource implementation, implement said abstract method to return
the rtc::VideoSourceInterface scoped ptr.

[hjon, 2016/01/12 00:25:15]

Done.

+}
+
+- (instancetype)initWithNativeVideoSource:
+    (rtc::scoped_refptr<webrtc::VideoSourceInterface>)nativeVideoSource {
+  return [super initWithNativeMediaSource:nativeVideoSource];
+}
+
+@end