Reland of Add experimental simulcast screen content mode

webrtc/modules/BUILD.gn

 # Copyright (c) 2016 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("audio_coding/audio_coding.gni")
@@ skipping 496 matching lines @@
       "video_coding/session_info_unittest.cc",
       "video_coding/test/stream_generator.cc",
       "video_coding/test/stream_generator.h",
       "video_coding/timing_unittest.cc",
       "video_coding/utility/default_video_bitrate_allocator_unittest.cc",
       "video_coding/utility/frame_dropper_unittest.cc",
       "video_coding/utility/ivf_file_writer_unittest.cc",
       "video_coding/utility/moving_average_unittest.cc",
       "video_coding/utility/quality_scaler_unittest.cc",
       "video_coding/utility/simulcast_rate_allocator_unittest.cc",
+      "video_coding/video_codec_initializer_unittest.cc",
       "video_coding/video_coding_robustness_unittest.cc",
       "video_coding/video_packet_buffer_unittest.cc",
       "video_coding/video_receiver_unittest.cc",
       "video_coding/video_sender_unittest.cc",
       "video_processing/test/denoiser_test.cc",
     ]
 
     if (apm_debug_dump) {
       defines += [ "WEBRTC_APM_DEBUG_DUMP=1" ]
     } else {
@@ skipping 231 matching lines @@
       "../test:test_common",
       "../test:test_main",
       "remote_bitrate_estimator:bwe_simulator_lib",
       "video_capture",
       "//testing/gmock",
       "//testing/gtest",
       "//third_party/gflags",
     ]
   }
 }