Add logging statements to places where the frame might be dropped in WebRTC pipeline.

webrtc/api/android/jni/peerconnection_jni.cc

 /*
  *  Copyright 2013 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 2015 matching lines @@
 
 JOW(jboolean, MediaStreamTrack_nativeSetEnabled)(
     JNIEnv* jni, jclass, jlong j_p, jboolean enabled) {
   return reinterpret_cast<MediaStreamTrackInterface*>(j_p)
       ->set_enabled(enabled);
 }
 
 JOW(void, VideoTrack_nativeAddRenderer)(
     JNIEnv* jni, jclass,
     jlong j_video_track_pointer, jlong j_renderer_pointer) {
+  LOG(LS_INFO) << "VideoTrack::nativeAddRenderer";
   reinterpret_cast<VideoTrackInterface*>(j_video_track_pointer)
       ->AddOrUpdateSink(
           reinterpret_cast<rtc::VideoSinkInterface<cricket::VideoFrame>*>(
               j_renderer_pointer),
           rtc::VideoSinkWants());
 }
 
 JOW(void, VideoTrack_nativeRemoveRenderer)(
     JNIEnv* jni, jclass,
     jlong j_video_track_pointer, jlong j_renderer_pointer) {
@@ skipping 272 matching lines @@
   return JavaStringFromStdString(
       jni,
       reinterpret_cast<RtpReceiverInterface*>(j_rtp_receiver_pointer)->id());
 }
 
 JOW(void, RtpReceiver_free)(JNIEnv* jni, jclass, jlong j_rtp_receiver_pointer) {
   reinterpret_cast<RtpReceiverInterface*>(j_rtp_receiver_pointer)->Release();
 }
 
 }  // namespace webrtc_jni