Don't reconfigure the encoder if the video options aren't changing.

webrtc/media/engine/fakewebrtccall.cc

 /*
  *  Copyright (c) 2015 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 165 matching lines @@
       if (!config.streams.empty()) {
         vpx_settings_.vp9.numberOfTemporalLayers = static_cast<unsigned char>(
             config.streams.back().temporal_layer_thresholds_bps.size() + 1);
       }
     } else {
       ADD_FAILURE() << "Unsupported encoder payload: "
                     << config_.encoder_settings.payload_name;
     }
   }
   codec_settings_set_ = config.encoder_specific_settings != NULL;
+  ++num_encoder_reconfigurations_;
 }
 
 webrtc::VideoCaptureInput* FakeVideoSendStream::Input() {
   return this;
 }
 
 void FakeVideoSendStream::Start() {
   sending_ = true;
 }
 
@@ skipping 254 matching lines @@
     case webrtc::MediaType::ANY:
       ADD_FAILURE()
           << "SignalChannelNetworkState called with unknown parameter.";
   }
 }
 
 void FakeCall::OnSentPacket(const rtc::SentPacket& sent_packet) {
   last_sent_packet_ = sent_packet;
 }
 }  // namespace cricket