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

webrtc/test/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")
 import("//build/config/ui.gni")
@@ skipping 266 matching lines @@
     "encoder_settings.cc",
     "encoder_settings.h",
     "fake_audio_device.cc",
     "fake_audio_device.h",
     "fake_decoder.cc",
     "fake_decoder.h",
     "fake_encoder.cc",
     "fake_encoder.h",
     "fake_network_pipe.cc",
     "fake_network_pipe.h",
+    "fake_videorenderer.h",
     "frame_generator_capturer.cc",
     "frame_generator_capturer.h",
     "layer_filtering_transport.cc",
     "layer_filtering_transport.h",
     "mock_transport.h",
     "mock_voe_channel_proxy.h",
     "mock_voice_engine.h",
     "null_transport.cc",
     "null_transport.h",
     "rtp_rtcp_observer.h",
@@ skipping 98 matching lines @@
     suppressed_configs += [ "//build/config/clang:find_bad_constructs" ]
   }
 
   deps = [
     ":test_support",
     ":video_test_common",
     "../modules/media_file",
     "//testing/gtest",
   ]
 }