Move responsibility for RTP header extensions on video receive.

media/engine/fakewebrtccall.h

Index: media/engine/fakewebrtccall.h
diff --git a/media/engine/fakewebrtccall.h b/media/engine/fakewebrtccall.h
index 04dc5d9e5d9e17d3b69571eaf82725861a25d9b4..b60d6d09ada168fea53f557926b2eb692ff1b224 100644
--- a/media/engine/fakewebrtccall.h
+++ b/media/engine/fakewebrtccall.h
@@ -259,6 +259,8 @@ class FakeCall final : public webrtc::Call, public webrtc::PacketReceiver {
   void SetStats(const webrtc::Call::Stats& stats);
 
  private:
+  void SetVideoReceiveRtpHeaderExtensions(
+      const std::vector<webrtc::RtpExtension>& extensions) override;
   webrtc::AudioSendStream* CreateAudioSendStream(
       const webrtc::AudioSendStream::Config& config) override;
   void DestroyAudioSendStream(webrtc::AudioSendStream* send_stream) override;