Remove rtcp_utility as mostly unused.

webrtc/modules/rtp_rtcp/BUILD.gn

 # Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
 #
 # Use of this source code is governed by a BSD-style license
 # that can be found in the LICENSE file in the root of the source
 # tree. An additional intellectual property rights grant can be found
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
 import("../../webrtc.gni")
 
@@ skipping 22 matching lines @@
     "source/forward_error_correction.h",
     "source/forward_error_correction_internal.cc",
     "source/forward_error_correction_internal.h",
     "source/packet_loss_stats.cc",
     "source/packet_loss_stats.h",
     "source/playout_delay_oracle.cc",
     "source/playout_delay_oracle.h",
     "source/receive_statistics_impl.cc",
     "source/receive_statistics_impl.h",
     "source/remote_ntp_time_estimator.cc",
+    "source/rtcp_nack_stats.cc",
+    "source/rtcp_nack_stats.h",
     "source/rtcp_packet.cc",
     "source/rtcp_packet.h",
     "source/rtcp_packet/app.cc",
     "source/rtcp_packet/app.h",
     "source/rtcp_packet/bye.cc",
     "source/rtcp_packet/bye.h",
     "source/rtcp_packet/common_header.cc",
     "source/rtcp_packet/common_header.h",
     "source/rtcp_packet/compound_packet.cc",
     "source/rtcp_packet/compound_packet.h",
@@ skipping 40 matching lines @@
     "source/rtcp_packet/tmmbr.cc",
     "source/rtcp_packet/tmmbr.h",
     "source/rtcp_packet/transport_feedback.cc",
     "source/rtcp_packet/transport_feedback.h",
     "source/rtcp_packet/voip_metric.cc",
     "source/rtcp_packet/voip_metric.h",
     "source/rtcp_receiver.cc",
     "source/rtcp_receiver.h",
     "source/rtcp_sender.cc",
     "source/rtcp_sender.h",
-    "source/rtcp_utility.cc",
-    "source/rtcp_utility.h",
     "source/rtp_format.cc",
     "source/rtp_format.h",
     "source/rtp_format_h264.cc",
     "source/rtp_format_h264.h",
     "source/rtp_format_video_generic.cc",
     "source/rtp_format_video_generic.h",
     "source/rtp_format_vp8.cc",
     "source/rtp_format_vp8.h",
     "source/rtp_format_vp9.cc",
     "source/rtp_format_vp9.h",
@@ skipping 120 matching lines @@
       "source/fec_test_helper.cc",
       "source/fec_test_helper.h",
       "source/flexfec_header_reader_writer_unittest.cc",
       "source/flexfec_receiver_unittest.cc",
       "source/flexfec_sender_unittest.cc",
       "source/nack_rtx_unittest.cc",
       "source/packet_loss_stats_unittest.cc",
       "source/playout_delay_oracle_unittest.cc",
       "source/receive_statistics_unittest.cc",
       "source/remote_ntp_time_estimator_unittest.cc",
+      "source/rtcp_nack_stats_unittest.cc",
       "source/rtcp_packet/app_unittest.cc",
       "source/rtcp_packet/bye_unittest.cc",
       "source/rtcp_packet/common_header_unittest.cc",
       "source/rtcp_packet/compound_packet_unittest.cc",
       "source/rtcp_packet/dlrr_unittest.cc",
       "source/rtcp_packet/extended_jitter_report_unittest.cc",
       "source/rtcp_packet/extended_reports_unittest.cc",
       "source/rtcp_packet/fir_unittest.cc",
       "source/rtcp_packet/nack_unittest.cc",
       "source/rtcp_packet/pli_unittest.cc",
       "source/rtcp_packet/rapid_resync_request_unittest.cc",
       "source/rtcp_packet/receiver_report_unittest.cc",
       "source/rtcp_packet/remb_unittest.cc",
       "source/rtcp_packet/report_block_unittest.cc",
       "source/rtcp_packet/rpsi_unittest.cc",
       "source/rtcp_packet/rrtr_unittest.cc",
       "source/rtcp_packet/sdes_unittest.cc",
       "source/rtcp_packet/sender_report_unittest.cc",
       "source/rtcp_packet/sli_unittest.cc",
       "source/rtcp_packet/target_bitrate_unittest.cc",
       "source/rtcp_packet/tmmbn_unittest.cc",
       "source/rtcp_packet/tmmbr_unittest.cc",
       "source/rtcp_packet/transport_feedback_unittest.cc",
       "source/rtcp_packet/voip_metric_unittest.cc",
       "source/rtcp_packet_unittest.cc",
       "source/rtcp_receiver_unittest.cc",
       "source/rtcp_sender_unittest.cc",
-      "source/rtcp_utility_unittest.cc",
       "source/rtp_fec_unittest.cc",
       "source/rtp_format_h264_unittest.cc",
       "source/rtp_format_vp8_test_helper.cc",
       "source/rtp_format_vp8_test_helper.h",
       "source/rtp_format_vp8_unittest.cc",
       "source/rtp_format_vp9_unittest.cc",
       "source/rtp_header_extension_unittest.cc",
       "source/rtp_packet_history_unittest.cc",
       "source/rtp_packet_unittest.cc",
       "source/rtp_payload_registry_unittest.cc",
@@ skipping 26 matching lines @@
     ]
 
     # TODO(jschuh): bugs.webrtc.org/1348: fix this warning.
     configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
     if (!build_with_chromium && is_clang) {
       # Suppress warnings from the Chromium Clang plugin (bugs.webrtc.org/163).
       suppressed_configs += [ "//build/config/clang:find_bad_constructs" ]
     }
   }
 }