Revert of Add a flags field to video timing extension.

webrtc/modules/video_coding/codecs/vp9/vp9_impl.cc

 /*
  *  Copyright (c) 2014 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 692 matching lines @@
   if (encoded_image_._length > 0) {
     TRACE_COUNTER1("webrtc", "EncodedFrameSize", encoded_image_._length);
     encoded_image_._timeStamp = input_image_->timestamp();
     encoded_image_.capture_time_ms_ = input_image_->render_time_ms();
     encoded_image_.rotation_ = input_image_->rotation();
     encoded_image_.content_type_ = (codec_.mode == kScreensharing)
                                        ? VideoContentType::SCREENSHARE
                                        : VideoContentType::UNSPECIFIED;
     encoded_image_._encodedHeight = raw_->d_h;
     encoded_image_._encodedWidth = raw_->d_w;
-    encoded_image_.timing_.flags = TimingFrameFlags::kInvalid;
+    encoded_image_.timing_.is_timing_frame = false;
     int qp = -1;
     vpx_codec_control(encoder_, VP8E_GET_LAST_QUANTIZER, &qp);
     encoded_image_.qp_ = qp;
 
     encoded_complete_callback_->OnEncodedImage(encoded_image_, &codec_specific,
                                                &frag_info);
   }
   return WEBRTC_VIDEO_CODEC_OK;
 }
 
@@ skipping 285 matching lines @@
   frame_buffer_pool_.ClearPool();
   inited_ = false;
   return WEBRTC_VIDEO_CODEC_OK;
 }
 
 const char* VP9DecoderImpl::ImplementationName() const {
   return "libvpx";
 }
 
 }  // namespace webrtc