Remove Observer methods in RTCVideoEncoderFactory.

content/renderer/media/rtc_video_encoder_factory.cc

Index: content/renderer/media/rtc_video_encoder_factory.cc
diff --git a/content/renderer/media/rtc_video_encoder_factory.cc b/content/renderer/media/rtc_video_encoder_factory.cc
index 6410749fc8d8712e31256d3fa2d3176c21e9be6f..df9d959fbdd8c74e95abdb0cc4c2c4e767253969 100644
--- a/content/renderer/media/rtc_video_encoder_factory.cc
+++ b/content/renderer/media/rtc_video_encoder_factory.cc
@@ -87,12 +87,6 @@ webrtc::VideoEncoder* RTCVideoEncoderFactory::CreateVideoEncoder(
       type, WebRTCCodecToVideoCodecProfile(type), gpu_factories_);
 }
 
-void RTCVideoEncoderFactory::AddObserver(Observer* observer) {
-  // No-op: our codec list is populated on installation.
-}
-
-void RTCVideoEncoderFactory::RemoveObserver(Observer* observer) {}
-
 const std::vector<cricket::WebRtcVideoEncoderFactory::VideoCodec>&
 RTCVideoEncoderFactory::codecs() const {
   return codecs_;