Cleanup webrtc:: namespace from leaked TimingFrameFlags

Bug: webrtc:9351
Change-Id: Ifbc0a522bf13ab62a2e490b9f129eacfabe7796f
Reviewed-on: https://webrtc-review.googlesource.com/80961
Commit-Queue: Ilya Nikolaevskiy <ilnik@webrtc.org>
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#23520}
diff --git a/modules/video_coding/frame_buffer.cc b/modules/video_coding/frame_buffer.cc
index f06e40f..add304d 100644
--- a/modules/video_coding/frame_buffer.cc
+++ b/modules/video_coding/frame_buffer.cc
@@ -164,7 +164,7 @@
     rotation_ = packet.video_header.rotation;
     _rotation_set = true;
     content_type_ = packet.video_header.content_type;
-    if (packet.video_header.video_timing.flags != TimingFrameFlags::kInvalid) {
+    if (packet.video_header.video_timing.flags != VideoSendTiming::kInvalid) {
       timing_.encode_start_ms =
           ntp_time_ms_ + packet.video_header.video_timing.encode_start_delta_ms;
       timing_.encode_finish_ms =