Add proper lifetime of encoder-specific settings

webrtc/media/engine/fakewebrtccall.cc

Index: webrtc/media/engine/fakewebrtccall.cc
diff --git a/webrtc/media/engine/fakewebrtccall.cc b/webrtc/media/engine/fakewebrtccall.cc
index cb904df66fdcf1275bf722ddb6220968bd0bd8ab..d254982af22f32604d7ee917930fe091c9510e29 100644
--- a/webrtc/media/engine/fakewebrtccall.cc
+++ b/webrtc/media/engine/fakewebrtccall.cc
@@ -181,15 +181,13 @@ void FakeVideoSendStream::ReconfigureVideoEncoder(
     webrtc::VideoEncoderConfig config) {
   if (config.encoder_specific_settings != NULL) {
     if (config_.encoder_settings.payload_name == "VP8") {
-      vpx_settings_.vp8 = *reinterpret_cast<const webrtc::VideoCodecVP8*>(
-                              config.encoder_specific_settings);
+      config.encoder_specific_settings->FillVideoCodecVp8(&vpx_settings_.vp8);
       if (!config.streams.empty()) {
         vpx_settings_.vp8.numberOfTemporalLayers = static_cast<unsigned char>(
             config.streams.back().temporal_layer_thresholds_bps.size() + 1);
       }
     } else if (config_.encoder_settings.payload_name == "VP9") {
-      vpx_settings_.vp9 = *reinterpret_cast<const webrtc::VideoCodecVP9*>(
-                              config.encoder_specific_settings);
+      config.encoder_specific_settings->FillVideoCodecVp9(&vpx_settings_.vp9);
       if (!config.streams.empty()) {
         vpx_settings_.vp9.numberOfTemporalLayers = static_cast<unsigned char>(
             config.streams.back().temporal_layer_thresholds_bps.size() + 1);