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/modules.gyp b/webrtc/modules/modules.gyp
index 08f455e..d5df853 100644
--- a/webrtc/modules/modules.gyp
+++ b/webrtc/modules/modules.gyp
@@ -370,6 +370,7 @@
             'video_coding/jitter_estimator_tests.cc',
             'video_coding/media_optimization_unittest.cc',
             'video_coding/nack_module_unittest.cc',
+            'video_coding/packet_buffer_unittest.cc',
             'video_coding/percentile_filter_unittest.cc',
             'video_coding/receiver_unittest.cc',
             'video_coding/session_info_unittest.cc',