Add class which periodically computes statistics.

webrtc/video/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("../build/webrtc.gni")
 
 source_set("video") {
   sources = [
     "call_stats.cc",
     "call_stats.h",
     "encoded_frame_callback_adapter.cc",
     "encoded_frame_callback_adapter.h",
     "encoder_state_feedback.cc",
     "encoder_state_feedback.h",
     "overuse_frame_detector.cc",
     "overuse_frame_detector.h",
     "payload_router.cc",
     "payload_router.h",
     "receive_statistics_proxy.cc",
     "receive_statistics_proxy.h",
     "report_block_stats.cc",
     "report_block_stats.h",
     "send_statistics_proxy.cc",
     "send_statistics_proxy.h",
+    "stats_counter.cc",
+    "stats_counter.h",
     "stream_synchronization.cc",
     "stream_synchronization.h",
     "video_capture_input.cc",
     "video_capture_input.h",
     "video_decoder.cc",
     "video_encoder.cc",
     "video_receive_stream.cc",
     "video_receive_stream.h",
     "video_send_stream.cc",
     "video_send_stream.h",
@@ skipping 27 matching lines @@
     "../modules/rtp_rtcp",
     "../modules/utility",
     "../modules/video_capture:video_capture_module",
     "../modules/video_coding",
     "../modules/video_processing",
     "../modules/video_render:video_render_module",
     "../system_wrappers",
     "../voice_engine",
   ]
 }