Remove Observer methods in RTCVideoEncoderFactory.

content/renderer/media/rtc_video_encoder_factory.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/renderer/media/rtc_video_encoder_factory.h"
 
 #include "base/command_line.h"
 #include "content/common/gpu/client/gpu_video_encode_accelerator_host.h"
 #include "content/public/common/content_switches.h"
 #include "content/renderer/media/rtc_video_encoder.h"
@@ skipping 69 matching lines @@
       found = true;
       break;
     }
   }
   if (!found)
     return NULL;
   return new RTCVideoEncoder(
       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_;
 }
 
 void RTCVideoEncoderFactory::DestroyVideoEncoder(
     webrtc::VideoEncoder* encoder) {
   delete encoder;
 }
 
 }  // namespace content