Revert of Work on flexible mode and screen sharing.

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("../../build/webrtc.gni")
 
@@ skipping 194 matching lines @@
   ]
   if (rtc_build_libvpx) {
     deps += [ rtc_libvpx_dir ]
   }
 }
 
 source_set("webrtc_vp9") {
   if (rtc_build_vp9) {
     sources = [
       "codecs/vp9/include/vp9.h",
-      "codecs/vp9/screenshare_layers.cc",
-      "codecs/vp9/screenshare_layers.h",
       "codecs/vp9/vp9_frame_buffer_pool.cc",
       "codecs/vp9/vp9_frame_buffer_pool.h",
       "codecs/vp9/vp9_impl.cc",
       "codecs/vp9/vp9_impl.h",
     ]
   } else {
     sources = [
       "codecs/vp9/vp9_dummy_impl.cc",
     ]
   }
 
   configs += [ "../..:common_config" ]
   public_configs = [ "../..:common_inherited_config" ]
 
   if (is_clang) {
     # Suppress warnings from Chrome's Clang plugins.
     # See http://code.google.com/p/webrtc/issues/detail?id=163 for details.
     configs -= [ "//build/config/clang:find_bad_constructs" ]
   }
 
   deps = [
     ":video_coding_utility",
     "../../common_video",
     "../../system_wrappers",
   ]
   if (rtc_build_libvpx) {
     deps += [ rtc_libvpx_dir ]
   }
 }