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 fdf7cf36fc4bb678d09d9dc6a66c00a2c24a9d8f..73b2df5755f9c65cd01f5e5e163197f0141b8e8e 100644
--- a/webrtc/media/engine/fakewebrtccall.cc
+++ b/webrtc/media/engine/fakewebrtccall.cc
@@ -181,15 +181,13 @@ void FakeVideoSendStream::ReconfigureVideoEncoder(
   encoder_config_ = 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);