[Mojo Video Capture] Implement a VideoCaptureProvider using the Mojo service (part 2)

services/video_capture/service_impl.cc

Index: services/video_capture/service_impl.cc
diff --git a/services/video_capture/service_impl.cc b/services/video_capture/service_impl.cc
index 086b0c64c78fdca44d990a51f007da67c84f2960..16bfa06d59cbce36495bfcfca0450958c9417d36 100644
--- a/services/video_capture/service_impl.cc
+++ b/services/video_capture/service_impl.cc
@@ -35,6 +35,7 @@ void ServiceImpl::OnBindInterface(
     const std::string& interface_name,
     mojo::ScopedMessagePipeHandle interface_pipe) {
   DCHECK(thread_checker_.CalledOnValidThread());
+  DCHECK(thread_checker_.CalledOnValidThread());
   registry_.BindInterface(source_info, interface_name,
                           std::move(interface_pipe));
 }