Revert of Add a flags field to video timing extension.

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

 /*
  *  Copyright 2017 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 22 matching lines @@
 /** Represents an encoded frame. Corresponds to webrtc::EncodedImage. */
 RTC_EXPORT
 @interface RTCEncodedImage : NSObject
 
 @property(nonatomic, strong) NSData *buffer;
 @property(nonatomic, assign) int encodedWidth;
 @property(nonatomic, assign) int encodedHeight;
 @property(nonatomic, assign) uint32_t timeStamp;
 @property(nonatomic, assign) long captureTimeMs;
 @property(nonatomic, assign) long ntpTimeMs;
-@property(nonatomic, assign) uint8_t flags;
+@property(nonatomic, assign) BOOL isTimingFrame;
 @property(nonatomic, assign) long encodeStartMs;
 @property(nonatomic, assign) long encodeFinishMs;
 @property(nonatomic, assign) RTCFrameType frameType;
 @property(nonatomic, assign) int rotation;
 @property(nonatomic, assign) BOOL completeFrame;
 @property(nonatomic, strong) NSNumber *qp;
 @property(nonatomic, assign) RTCVideoContentType contentType;
 
 @end
 
@@ skipping 120 matching lines @@
 - (NSInteger)decode:(RTCEncodedImage *)encodedImage
           missingFrames:(BOOL)missingFrames
     fragmentationHeader:(RTCRtpFragmentationHeader *)fragmentationHeader
       codecSpecificInfo:(__nullable id<RTCCodecSpecificInfo>)info
            renderTimeMs:(int64_t)renderTimeMs;
 - (NSString *)implementationName;
 
 @end
 
 NS_ASSUME_NONNULL_END