Reland of Injectable Obj-C video codecs

webrtc/sdk/objc/Framework/Headers/WebRTC/RTCVideoFrame.h

 /*
  *  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.
  */
 
@@ skipping 33 matching lines @@
     const uint8_t *dataU DEPRECATED_MSG_ATTRIBUTE("use [buffer toI420]");
 @property(nonatomic, readonly, nullable)
     const uint8_t *dataV DEPRECATED_MSG_ATTRIBUTE("use [buffer toI420]");
 @property(nonatomic, readonly) int strideY DEPRECATED_MSG_ATTRIBUTE("use [buffer toI420]");
 @property(nonatomic, readonly) int strideU DEPRECATED_MSG_ATTRIBUTE("use [buffer toI420]");
 @property(nonatomic, readonly) int strideV DEPRECATED_MSG_ATTRIBUTE("use [buffer toI420]");
 
 /** Timestamp in nanoseconds. */
 @property(nonatomic, readonly) int64_t timeStampNs;
 
+/** Timestamp 90 kHz. */
+@property(nonatomic, assign) int32_t timeStamp;
+
 /** The native handle should be a pixel buffer on iOS. */
 @property(nonatomic, readonly)
     CVPixelBufferRef nativeHandle DEPRECATED_MSG_ATTRIBUTE("use buffer instead");
 
 @property(nonatomic, readonly) id<RTCVideoFrameBuffer> buffer;
 
 - (instancetype)init NS_UNAVAILABLE;
 - (instancetype)new NS_UNAVAILABLE;
 
 /** Initialize an RTCVideoFrame from a pixel buffer, rotation, and timestamp.
@@ skipping 26 matching lines @@
                    timeStampNs:(int64_t)timeStampNs;
 
 /** Return a frame that is guaranteed to be I420, i.e. it is possible to access
  *  the YUV data on it.
  */
 - (RTCVideoFrame *)newI420VideoFrame;
 
 @end
 
 NS_ASSUME_NONNULL_END