[Mojo Video Capture] Add unit tests for ServiceVideoCaptureDeviceLauncher

content/test/BUILD.gn

Index: content/test/BUILD.gn
diff --git a/content/test/BUILD.gn b/content/test/BUILD.gn
index caa3a2747147fae122ce0f84a78666d093d3693e..c54e19b60e5192dae36a1b3f991dee04625323d5 100644
--- a/content/test/BUILD.gn
+++ b/content/test/BUILD.gn
@@ -1252,6 +1252,7 @@ test("content_unittests") {
     "../browser/renderer_host/media/mock_video_capture_provider.h",
     "../browser/renderer_host/media/render_frame_audio_output_stream_factory_unittest.cc",
     "../browser/renderer_host/media/renderer_audio_output_stream_factory_context_impl_unittest.cc",
+    "../browser/renderer_host/media/service_video_capture_device_launcher_unittest.cc",
     "../browser/renderer_host/media/video_capture_buffer_pool_unittest.cc",
     "../browser/renderer_host/media/video_capture_controller_unittest.cc",
     "../browser/renderer_host/media/video_capture_manager_unittest.cc",
@@ -1520,6 +1521,7 @@ test("content_unittests") {
     "//services/file:lib",
     "//services/file/public/interfaces",
     "//services/service_manager/public/cpp:service_test_support",
+    "//services/video_capture/public/interfaces",
     "//skia",
     "//sql",
     "//sql:test_support",