Reland of Add experimental simulcast screen content mode

webrtc/modules/video_coding/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("../../webrtc.gni")
 
@@ skipping 353 matching lines @@
       "session_info_unittest.cc",
       "test/stream_generator.cc",
       "test/stream_generator.h",
       "timing_unittest.cc",
       "utility/default_video_bitrate_allocator_unittest.cc",
       "utility/frame_dropper_unittest.cc",
       "utility/ivf_file_writer_unittest.cc",
       "utility/moving_average_unittest.cc",
       "utility/quality_scaler_unittest.cc",
       "utility/simulcast_rate_allocator_unittest.cc",
+      "video_codec_initializer_unittest.cc",
       "video_coding_robustness_unittest.cc",
       "video_packet_buffer_unittest.cc",
       "video_receiver_unittest.cc",
       "video_sender_unittest.cc",
     ]
     if (rtc_libvpx_build_vp9) {
       sources += [ "codecs/vp9/vp9_screenshare_layers_unittest.cc" ]
     }
     if (rtc_use_h264) {
       sources += [ "codecs/h264/h264_encoder_impl_unittest.cc" ]
@@ skipping 30 matching lines @@
     }
 
     # TODO(jschuh): bugs.webrtc.org/1348: fix this warning.
     configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
     if (!build_with_chromium && is_clang) {
       # Suppress warnings from the Chromium Clang plugin (bugs.webrtc.org/163).
       suppressed_configs += [ "//build/config/clang:find_bad_constructs" ]
     }
   }
 }