DirectX based screen capturer logic

webrtc/modules/desktop_capture/BUILD.gn

Index: webrtc/modules/desktop_capture/BUILD.gn
diff --git a/webrtc/modules/desktop_capture/BUILD.gn b/webrtc/modules/desktop_capture/BUILD.gn
index 894d9308e367b3da476d369a35269f7b9ac60954..63e43d9220295add053779a82ee961fe477a2b67 100644
--- a/webrtc/modules/desktop_capture/BUILD.gn
+++ b/webrtc/modules/desktop_capture/BUILD.gn
@@ -79,6 +79,8 @@ source_set("desktop_capture") {
     "win/scoped_thread_desktop.h",
     "win/screen_capture_utils.cc",
     "win/screen_capture_utils.h",
+    "win/screen_capturer_win_directx.cc",
+    "win/screen_capturer_win_directx.h",
     "win/screen_capturer_win_gdi.cc",
     "win/screen_capturer_win_gdi.h",
     "win/screen_capturer_win_magnifier.cc",
@@ -121,6 +123,10 @@ source_set("desktop_capture") {
     ]
   }
 
+  if (is_win) {
+    libs = [ "d3d11.lib" ]
+  }
+
   configs += [ "../..:common_config" ]
   public_configs = [ "../..:common_inherited_config" ]