Packet buffer for the new jitter buffer.

BUG=webrtc:5514
R=stefan@webrtc.org, mflodman@webrtc.org

Review URL: https://codereview.webrtc.org/1772383002

Cr-Commit-Position: refs/heads/master@{#12194}
diff --git a/webrtc/modules/video_coding/BUILD.gn b/webrtc/modules/video_coding/BUILD.gn
index 37a0d2c..bc6f595 100644
--- a/webrtc/modules/video_coding/BUILD.gn
+++ b/webrtc/modules/video_coding/BUILD.gn
@@ -25,6 +25,8 @@
     "fec_tables_xor.h",
     "frame_buffer.cc",
     "frame_buffer.h",
+    "frame_object.cc",
+    "frame_object.h",
     "generic_decoder.cc",
     "generic_decoder.h",
     "generic_encoder.cc",
@@ -50,6 +52,8 @@
     "nack_module.h",
     "packet.cc",
     "packet.h",
+    "packet_buffer.cc",
+    "packet_buffer.h",
     "percentile_filter.cc",
     "percentile_filter.h",
     "qm_select.cc",