Update unityplugin to use VcmCapturer.

Replaces use of WebRtcVideoDeviceCapturerFactory.

Bug: webrtc:6353
Change-Id: I3c1626af46cb56817190739a39842c4c5a51560d
Reviewed-on: https://webrtc-review.googlesource.com/c/115960
Reviewed-by: Kári Helgason <kthelgason@webrtc.org>
Commit-Queue: Niels Moller <nisse@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#26117}
diff --git a/examples/BUILD.gn b/examples/BUILD.gn
index 3fded23..d5aef6a 100644
--- a/examples/BUILD.gn
+++ b/examples/BUILD.gn
@@ -868,7 +868,9 @@
       "../modules/audio_processing:audio_processing",
       "../modules/video_capture:video_capture_module",
       "../pc:libjingle_peerconnection",
+      "../pc:peerconnection",
       "../rtc_base:rtc_base",
+      "../test:video_test_common",
       "//third_party/abseil-cpp/absl/memory",
     ]
     if (is_android) {