Add periodic logging of number of captured and dropped frames in VideoCaptureInput.

webrtc/video/video_capture_input.h

 /*
  *  Copyright (c) 2012 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.
  */
 
@@ skipping 44 matching lines @@
   rtc::Event* const capture_event_;
 
   std::unique_ptr<VideoFrame> captured_frame_ GUARDED_BY(crit_);
   Clock* const clock_;
   // Used to make sure incoming time stamp is increasing for every frame.
   int64_t last_captured_timestamp_;
   // Delta used for translating between NTP and internal timestamps.
   const int64_t delta_ntp_internal_ms_;
 
   OveruseFrameDetector* const overuse_detector_;
+
+  int64_t last_frame_log_ms_;
+  int captured_frame_count_;
+  int dropped_frame_count_;
 };
 
 }  // namespace internal
 }  // namespace webrtc
 
 #endif  // WEBRTC_VIDEO_VIDEO_CAPTURE_INPUT_H_