Add video_loopback to gn.

webrtc/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.
 
 # TODO(kjellander): Rebase this to webrtc/build/common.gypi changes after r6330.
 
@@ skipping 276 matching lines @@
 
 if (!build_with_chromium) {
   executable("webrtc_tests") {
     testonly = true
     deps = [
       ":webrtc",
       "modules/video_capture:video_capture_internal_impl",
       "test",
     ]
   }
+
+  executable("video_loopback") {
+    testonly = true
+    sources = [
+      "test/run_test.h",
+      "video/video_loopback.cc",
+    ]
+
+    if (is_mac) {
+      sources += [ "test/mac/run_test.mm" ]
+    } else {
+      sources += [ "test/run_test.cc" ]
+    }
+    deps = [
+      ":video_quality_test",
+      "system_wrappers:metrics_default",
+      "test:field_trial",
+      "test:test_common",
+      "test:test_renderer",
+      "//testing/gmock",
+      "//testing/gtest",
+      "//third_party/gflags",
+    ]
+    if (is_clang && !is_nacl) {
+      # 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" ]
+    }
+  }
 }
 
 source_set("webrtc_common") {
   sources = [
     "audio_sink.h",
     "common_types.cc",
     "common_types.h",
     "config.cc",
     "config.h",
     "engine_configurations.h",
@@ skipping 459 matching lines @@
     if (is_ios || (is_mac && target_cpu != "x86")) {
       defines = [ "CARBON_DEPRECATED=YES" ]
     }
     if (is_clang) {
       # Suppress warnings from the Chromium Clang plugin.
       # See http://code.google.com/p/webrtc/issues/detail?id=163 for details.
       configs -= [ "//build/config/clang:find_bad_constructs" ]
     }
   }
 }