An example of Unity native plugin of webrtc for Windows OS

webrtc/examples/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("../webrtc.gni")
 if (is_android) {
@@ skipping 585 matching lines @@
       "//webrtc/system_wrappers:field_trial_default",
       "//webrtc/system_wrappers:metrics_default",
     ]
     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" ]
     }
   }
 }
 
+if (is_win) {
+  rtc_shared_library("webrtc_unity_plugin") {
+    testonly = true
+    sources = [
+      "unityplugin/simple_peer_connection.cc",
+      "unityplugin/simple_peer_connection.h",
+      "unityplugin/unity_plugin_apis.cc",
+      "unityplugin/unity_plugin_apis.h",
+    ]
+    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" ]
+    }
+    cflags = [ "/wd4245" ]
+    configs += [
+      "//build/config/win:windowed",
+      ":peerconnection_client_warnings_config",
+    ]
+    deps = [
+      "//webrtc/api:libjingle_peerconnection_test_api",
+      "//webrtc/api:video_frame_api",
+      "//webrtc/base:rtc_base",
+      "//webrtc/base:rtc_base_approved",
+      "//webrtc/base:rtc_json",
+      "//webrtc/media:rtc_media",
+      "//webrtc/media:rtc_media_base",
+      "//webrtc/modules/video_capture:video_capture_module",
+      "//webrtc/pc:libjingle_peerconnection",
+      "//webrtc/system_wrappers:field_trial_default",
+      "//webrtc/system_wrappers:metrics_default",
+    ]
+  }
+}
+
 if (!build_with_chromium) {
   # Doesn't build within Chrome on Win.
   rtc_executable("stun_prober") {
     testonly = true
     sources = [
       "stunprober/main.cc",
     ]
 
     if (!build_with_chromium && is_clang) {
       # Suppress warnings from Chrome's Clang plugins.
       # See http://code.google.com/p/webrtc/issues/detail?id=163 for details.
       suppressed_configs += [ "//build/config/clang:find_bad_constructs" ]
     }
 
     deps = [
       "../base:rtc_base",
       "../base:rtc_base_approved",
       "../p2p:libstunprober",
       "../p2p:rtc_p2p",
       "../system_wrappers:field_trial_default",
     ]
   }
 }