Implement FrameMarking header extension support

webrtc/test/fuzzers/rtp_packet_fuzzer.cc

Index: webrtc/test/fuzzers/rtp_packet_fuzzer.cc
diff --git a/webrtc/test/fuzzers/rtp_packet_fuzzer.cc b/webrtc/test/fuzzers/rtp_packet_fuzzer.cc
index da6294824a418f687d730717fa6e9edc46e02b16..a3f5dca1f65662ff0cb7c85899699e6d5a196361 100644
--- a/webrtc/test/fuzzers/rtp_packet_fuzzer.cc
+++ b/webrtc/test/fuzzers/rtp_packet_fuzzer.cc
@@ -100,6 +100,11 @@ void FuzzOneInput(const uint8_t* data, size_t size) {
         packet.GetExtension<RepairedRtpStreamId>(&rsid);
         break;
       }
+      case kRtpExtensionFrameMarking: {
+        FrameMarks frame_marks;
+        packet.GetExtension<FrameMarking>(&frame_marks);
+        break;
+      }
     }
   }
 }