Add explicit copy constructors to RTPHeader and RTPHeaderExtension

webrtc/common_types.cc

Index: webrtc/common_types.cc
diff --git a/webrtc/common_types.cc b/webrtc/common_types.cc
index 82307ce52b37393837d79bde3938ba101ab60c0c..0a0401ef82670ac674959233221737e6ac3ba7d7 100644
--- a/webrtc/common_types.cc
+++ b/webrtc/common_types.cc
@@ -57,6 +57,8 @@ RTPHeaderExtension::RTPHeaderExtension()
       videoContentType(VideoContentType::UNSPECIFIED),
       has_video_timing(false) {}
 
+RTPHeaderExtension::RTPHeaderExtension(const RTPHeaderExtension&) = default;
+
 RTPHeader::RTPHeader()
     : markerBit(false),
       payloadType(0),
@@ -70,6 +72,8 @@ RTPHeader::RTPHeader()
       payload_type_frequency(0),
       extension() {}
 
+RTPHeader::RTPHeader(const RTPHeader& other) = default;
+
 VideoCodec::VideoCodec()
     : codecType(kVideoCodecUnknown),
       plName(),