Don't detect a new frame if a previous packet is used in a previous frame.

webrtc/test/fuzzers/BUILD.gn

Index: webrtc/test/fuzzers/BUILD.gn
diff --git a/webrtc/test/fuzzers/BUILD.gn b/webrtc/test/fuzzers/BUILD.gn
index 141dcfe5149e34e5a1b58c18cf340edb7cafc35f..224b212c11d7845aa9197e00245ad6a86938f8ed 100644
--- a/webrtc/test/fuzzers/BUILD.gn
+++ b/webrtc/test/fuzzers/BUILD.gn
@@ -124,6 +124,16 @@ webrtc_fuzzer_test("flexfec_receiver_fuzzer") {
   libfuzzer_options = [ "max_len=2000" ]
 }
 
+webrtc_fuzzer_test("packet_buffer_fuzzer") {
+  sources = [
+    "packet_buffer_fuzzer.cc",
+  ]
+  deps = [
+    "../../modules/video_coding/",
+  ]
+  libfuzzer_options = [ "max_len=2000" ]
+}
+
 webrtc_fuzzer_test("rtcp_receiver_fuzzer") {
   sources = [
     "rtcp_receiver_fuzzer.cc",