Revert of Declare VideoCodec.codec_specific_info private

webrtc/config.cc

Index: webrtc/config.cc
diff --git a/webrtc/config.cc b/webrtc/config.cc
index 4b437e264d3dcebd675fb7c41ce4175697ed532c..281b89f46e5b5736d9da510b94596335c89e4ae7 100644
--- a/webrtc/config.cc
+++ b/webrtc/config.cc
@@ -167,11 +167,11 @@
 void VideoEncoderConfig::EncoderSpecificSettings::FillEncoderSpecificSettings(
     VideoCodec* codec) const {
   if (codec->codecType == kVideoCodecH264) {
-    FillVideoCodecH264(codec->H264());
+    FillVideoCodecH264(&codec->codecSpecific.H264);
   } else if (codec->codecType == kVideoCodecVP8) {
-    FillVideoCodecVp8(codec->VP8());
+    FillVideoCodecVp8(&codec->codecSpecific.VP8);
   } else if (codec->codecType == kVideoCodecVP9) {
-    FillVideoCodecVp9(codec->VP9());
+    FillVideoCodecVp9(&codec->codecSpecific.VP9);
   } else {
     RTC_NOTREACHED() << "Encoder specifics set/used for unknown codec type.";
   }